Answer:
y = 3x + 1
Step-by-step explanation:
The formula for equation of a line in slope intercept form is;
y = mx + c
Where;
m is slope
c is y-intercept
Now, since we have coordinates, we will get the equation as;
(y - y1)/(x - x1) = m
(y - 1)/(x - 0) = 3
y - 1 = 3x
y = 3x + 1
The games have been sorted into video games and board games. The number of video games is 28 less than 6 times the number of board games. The games are 80% video games. How many board games are there?
8
10
13
14
The number of board game sorted is 14
How to find the number of games?The games have been sorted into video games and board games.
The number of video games is 28 less than 6 times the number of board games.
Therefore,
the number of board games = x
number of video game = 6x - 28
The games are 80% video games. Hence,
80 / 100 × x + 6x - 28 = 6x - 28
4 / 5 × 7x - 28 = 6x - 28
4 / 5 (7x - 28) = 6x -28
28 / 5 x - 112 / 5 = 6x - 28
28 / 5 x - 6x = -28 + 112 / 5
28x - 30x / 5 = - 28 + 112 / 5
-2x / 5 = -28 / 5
-10x = -140
x = 14
Therefore, the number of board game sorted is 14.
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Answer:
14
Step-by-step explanation:
80 / 100 × x + 6x - 28 = 6x - 28
4 / 5 × 7x - 28 = 6x - 28
4 / 5 (7x - 28) = 6x -28
28 / 5 x - 112 / 5 = 6x - 28
28 / 5 x - 6x = -28 + 112 / 5
28x - 30x / 5 = - 28 + 112 / 5
-2x / 5 = -28 / 5
-10x = -140
x = 14
Consider the following 8 numbers, where one labelled
x
is unknown.
34
,
31
,
15
,
x
,
17
,
4
,
20
,
25
Given that the range of the numbers is 69, work out 2 values of
x
.
x
=
x
=
Answer:
x = 73
x = -35
Step-by-step explanation:
Here are the 8 numbers:
34, 31, 15, x, 17, 4, 20, 25
Here are the 8 numbers in ascending order with x as the greatest number:
4, 15, 17, 20, 25, 31, 34, x
x - 4 = 69
x = 73
Here are the 8 numbers in ascending order with x as the smallest number:
x, 4, 15, 17, 20, 25, 31, 34
34 - x = 69
-x = 69 - 34
-x = -35
x = -35
Answer:
x = 73
x = -35
Conveyor belts called grain elevators are used to move grain into a silo. Answer the following questions knowing that the lower end of the belt is 100 feet from the base of the silo and that the silo is 150 feet tall.
a. How long is the belt?
b. If we know the angle of elevation from the lower end of the belt to a window on the side of the silo is 45°, use special right triangle ratios to calculate the height of the window from the ground.
c. We need a ramp to the window. How long would it need to be?
From the given information,
a. The length of the belt is 180.28 ft
b. The height of the window from the ground is 100 ft
c. The length of the ramp needed is 141.42 ft
What is the Pythagorean theorem's formula?The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two legs of the triangle. I.e., (hypotenuse)² = (opposite)² + (adjacent)²
Calculation:It is given that,
The height of the silo is 150 feet
The distance from the belt to the silo is 100 feet
With the given measurements, a right-angled triangle is formed.
a. Finding the length of the belt:
From the diagram,
The height of the silo, sh = 150 ft
The base distance, sb = 100 ft
So, the length of the conveyor belt is the hypotenuse (bh) of the triangle formed.
On applying the Pythagorean theorem,
bh² = sb² + sh²
⇒ bh² = (100)² + (150)²
⇒ bh² = 32500
⇒ bh = √32500 = 50√13
∴ bh = 180.28 ft
Thus, the length of the belt is 180.28 ft.
b. Finding the height of the window from the ground:
It is given that the angle of elevation from the lower end of the belt(b) to a window(w) on the side of the silo is 45°.
This creates a special right-angled triangle. I.e.,
The angles of the new triangle are 90°- 45°. So, the third angle also becomes 45° (Since the sum of angles in a triangle is 180°)
So, the new triangle has angles of 90°- 45°- 45°
Thus, the new triangle is said to be an isosceles right angled triangle.
So, the two legs of the triangle are equal. I.e., sb = sw = 100 ft
Therefore, the height of the window from the ground(sw) is 100 ft
c. Finding the length of the ramp(bw) to the window:
Since we have
sw = 100 ft and sb = 100 ft
On applying Pythagora's theorem,
bw² = sb² + sw²
⇒ bw² = (100)² + (100)²
⇒ bw = √20000 = 141.42 ft
Therefore, the length of the ramp to the window is 141.42 ft.
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1. How much percent more than the cost price should a shopkeeper mark his goods so that after allowing a discount of 25% on the marked price, he gains 20% ?
2. When a bicycle is sold at marked price, a profit of 20% is earned by the seller. If a discount of 5% is allowed, the profit is only Rs. 180 earned by the seller. How much did the seller pay for the bicycle?
Answer:
1. 60%
2. He paid Rs. 1285.71
Step-by-step explanation:
1.
He buys an item for x.
He sells the item with a 25% of the marked price, and he still makes a 20% profit over his cost x.
He must sell for x + 20% of x which is the same as 1.2x.
Let the markup be y%.
Since he gives a 25% discount over the marked price, he sells for 75% of the marked price.
0.75(x + y% of x) = 1.2x
0.75(x + xy/100) = 1.2x
x + xy/100 = 1.6x
Divide both sides by x.
1 + y/100 = 1.6
Multiply both sides by 100.
100 + y = 160
y = 60
Remember that y is in percent, so the markup must be 60%.
Check:
He buys an item for $10.
He applies a markup of 60%. 1.6 × $10 = $16.
He has a price of $16 for this item.
Now he gives a 25% discount. That means the discounted price is 75% of the marked price.
75% of $16 = $12
He sells at a 25% discount for $12.
Compare the actual selling price after the 25% discount with this cost.
$12 compared to $10.
$12/$10 = 1.2 = 120%
Since he sells for 120% of the original price, the markup is 20% which is what he wanted.
2.
The cost to the seller is x.
If he sells it at a 20% profit, then he sells it for 1.2x
Now he gives a discount of 5%, so the final selling price after discount is
0.95(1.2x)
The profit is the difference between what he sold it for, 0.95(1.2x), and what he bought is for, x, and it is Rs. 180.
0.95(1.2x) - x = 180
1.14x - x = 180
0.14x = 180
x = 1285.71
Answer: He paid Rs. 1285.71
Identify the next number in the following sequence and tell how:
25 - 49 - 97 - ?
a) 124 b) 171 c) 139 d)193
Answer:
d
Step-by-step explanation:
multiply by 2 then subtract 1
2(25)-1=49
2(49)-1=97
2(97)-1=193
does this represent quntitites that are proportional
Answer:
B
Step-by-step explanation:
Not all of the pairs represent the same ratio
Fill in the blank 57.59 - ___=1.29
Answer: 57.59- 56.3=1.29
Step-by-step explanation:
57.59-x = 1.29
-x= 1.29-57.59
(—) -x= - 56.3
x=56.3
022 A. Find the unit vector in the direction of F 2+3j+4k B. Find the distance between F1 = 3i+2j+ 5k and F2 = 3i +4j +5k C Find the component of each directed line segment whose initial point contains p, and the terminal point P₂ i.) P, (3,2,2), P₂(3,-2,-3) ii.) P₂(2,-3,-6), P3(-3,3,2)
By definition of vectors exist as quantities that contain magnitude (positive or negative) and direction.
A) The unit vector in the direction of [tex]$F = i + \frac{3j}{2} +2k.[/tex]
B) The distance between [tex]F_{1}[/tex] and [tex]F_{2}[/tex] exists 2.
C) i.) Required vector = −4j − 5k
ii.) Required vector = 5i − 6j − 8k
How to estimate unit vector?To estimate the unit vector in the direction of V = 2i+3j+4k
|V| [tex]$= \sqrt{2^2+3^2+4^2}[/tex]
[tex]$= \sqrt{29}[/tex]
A) Unit vector
[tex]$F= \frac{V}{ |V|}[/tex]
[tex]$F= \frac{2i+3j +4k}{2}[/tex]
[tex]$F = \frac{2i}{2} + \frac{3j}{2} +\frac{4k}{2}[/tex]
[tex]$F= i + \frac{3j}{2} +2k.[/tex]
Therefore, unit vector in the direction of [tex]$F = i + \frac{3j}{2} +2k.[/tex]
B) To estimate the distance between [tex]F_{1}[/tex] = 3i+2j+ 5k and [tex]F_{2}[/tex] = 3i +4j +5k
[tex]$d = \sqrt{(3-3)^{2}+(4-2)^{2}+(5-5)^{2}}[/tex]
= 2
Therefore, the distance between [tex]F_{1}[/tex] and [tex]F_{2}[/tex] exists 2.
C) i.) P, (3,2,2), P₂(3,-2,-3)
Required vector =|[tex]P_{1}[/tex]P₂|=(3−3)i + ((−2)-2)j + ((-3)-2)k
= −4j − 5k
ii.) P₂ (2,-3,-6), [tex]P_{3}[/tex] (-3,3,2)
Required vector =|P₂[tex]P_{3}[/tex]|=(-3-2)i + (3-(-3))j + (2-(-6))k
= 5i − 6j − 8k
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Which of the following inequalities matches the graph?
Ox=-7
Oxs-7
Oys-7
Oyz-7
Answer:
Second option
Step-by-step explanation:
As its a solid line, it indicates the inequality contains equal to in it. As the line crosses the x - axis it must be an option whereby x > or x < . Now read the value which is 7 therefore x ≤ 7
everythings in the image
Answer:
t= d/r t=5
Step-by-step explanation:
divide each side by d to isolate t
Which choice is equivalent to the quotient shown here for acceptable
values of X?
√25(x-1) + √5(x-1)²
OA. √25(x-1)-5(x-1)²
OB.
5
1(x-1)
OC. √125(x-1)3³
OD. √5(x-1)
The equivalent to the quotient shown in the task content for acceptable values of x is; √(5/(x-1)).
What is the equivalent of the quotient?It follows from the task content that the expression given is; √(25(x-1)) ÷ √(5(x-1)²).
It therefore follows from the the laws of indices that the evaluation is thus;
= √{(25/5) ×(x-1)/(x-1)²}.
Ultimately, upon evaluation we have;
= √(5/(x-1))
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Please help!!! Plot the image of the triangle abc under reflection across x axis
Answer:
Step-by-step explanation:
Reflecting across the x-axis means (x,y) maps onto (x,-y).
So, A' has coordinates (-2,0), B' has coordinates (-6,-5), and C' has coordinates (-3, -4).
Given b(x)=|x+41|, what is b(-10)?
Answer:
31
Step-by-step explanation:
Substitute -10 for x in b(x)=|x+41|, obtaining f(-10) = |-10 + 41|. This result simplifies to f(-10) = |31| = 31
The sum of two numbers is 42. The greater number is equal to 5 times the smaller number. Find the numbers.
Answer:
35 and 7
Step-by-step explanation:
5x + 1x =42
6x=42
x=7
Answer:
Greater number: 35
Smaller number: 7
Step-by-step explanation:
1) Set up system of equations.
Let x = greater number
Let y = smaller number
----------------------------------------------
x + y = 42
x = 5y
2) Solve them using elimination or substitution.
x + y = 42
x - 5y = 0
----------------
6y = 42
y = 42/6
y = 7
3) Substitute the found answer into one of the two equations to find the value of x.
x = 5(7)
x = 35
Therefore, the greater number is 35, and the smaller number is 7.
One angle of a triangle measures twice the smallest angle. The third angle measures five more than twice the smallest angle. Find the measure of the smallest angle.
Answer: The smallest angle is 35°
Step-by-step explanation:
1 angle: 2x
smallest angle: x
third angle: 2x + 5
all angles in a triangle add up to 180 degrees. Therefore,
2x+x+2x+5 = 180
5x+5=180
5x+5(-5)=180(-5)
5x = 175
5x/5 = 175/5
x = 35
The smallest angle is 35°
In a recent year, the scores for the reading portion of a test were normally distributed, with a mean of 22.4 and a standard deviation of 5.1. Complete parts (a) through (d) below.
(a) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is less than 19.
The probability of a student scoring less than 19 is.
(Round to four decimal places as needed.)
(b) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is between 17.7 and 27.1.
The probability of a student scoring between 17.7 and 27.1 is.
(Round to four decimal places as needed.)
(c) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is more than 33.1.
The probability of a student scoring more than 33.1 is
3.1
is.
(Round to four decimal places as needed.)
(d) Identify any unusual events. Explain your reasoning. Choose the correct answer below.
OA. None of the events are unusual because all the probabilities are greater than 0.05.
B. The event in part (c) is unusual because its probability is less than 0.05.
C. The events in parts (a) and (b) are unusual because its probabilities are less than 0.05.
D. The event in part (a) is unusual because its probability is less than 0.05.
Help me solve this
Using the normal distribution, we have that:
a) The probability of a student scoring less than 19 is 0.2709 = 27.09%.
b) The probability of a student scoring between 17.7 and 27.1 is 0.6424 = 64.24%.
c) The probability of a student scoring more than 33.1 is 0.0179 = 1.79%.
d) The correct option is: B. The event in part (c) is unusual because its probability is less than 0.05.
Normal Probability DistributionThe z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean. Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.The mean and the standard deviation are given, respectively, by:
[tex]\mu = 22.4, \sigma = 5.1[/tex]
Item a:
The probability is the p-value of Z when X = 19, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{19 - 22.4}{5.1}[/tex]
Z = -0.67.
Z = -0.67 has a p-value of 0.2709.
The probability of a student scoring less than 19 is 0.2709 = 27.09%.
Item b:
The probability is the p-value of Z when X = 27.1 subtracted by the p-value of Z when X = 17.7, hence:
X = 27.1:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{27.1 - 22.4}{5.1}[/tex]
Z = 0.92.
Z = 0.92 has a p-value of 0.8212.
X = 17.7:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{17.7 - 22.4}{5.1}[/tex]
Z = -0.92.
Z = -0.92 has a p-value of 0.1788.
0.8212 - 0.1788 = 0.6424.
The probability of a student scoring between 17.7 and 27.1 is 0.6424 = 64.24%.
Item c:
The probability is one subtracted by the p-value of Z when X = 33.1, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{33.1 - 22.4}{5.1}[/tex]
Z = 2.1.
Z = 2.1 has a p-value of 0.9821.
1 - 0.9821 = 0.0179.
The probability of a student scoring more than 33.1 is 0.0179 = 1.79%.
Item d:
Probabilities less than 0.05 are unusual, hence the correct option is:
B. The event in part (c) is unusual because its probability is less than 0.05.
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Theodore invests $20,000 at 6% simple interest for 1 year. How much is in the account at the end of the 1
year period?
Answer:
Answer:
$21200
Step-by-step explanation:
6% × 20000 = 1200.
20000 + 1200 = 21200
basically yout find 6% of 20000 then add it the original 20000
If n = 140 and X = 112, construct a 95% confidence interval for the population proportion, p.
Give your answers to three decimals
The confidence interval for the population proportion, p is (0.766, 0.833)
Confidence intervalThe formula for calculating the confidence interval for proportion is expressed as:
CI = p±√pq/n
Given the following
p = 112/140 = 0.8
q = 1-p = 0.2
Substitute
CI = 0.8±√(0.8)(0.2)/140
CI = 0.8±0.0338
CI = (0.766, 0.833)
Hence the confidence interval for the population proportion, p is (0.766, 0.833)
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Identify the vertices of the feasible region for the given linear programming constraints.
System of Linear Programming:
z=−3x+5y
x+y≥−20
x−2y≥−2
x−y≤2
Fill in the vertices of the feasible region:
(−14, )
( ,−11)
(6, )
The vertices of the feasible region are as follows,
(-14, -11), (9, -11) and (6, 4)
What is a Feasible Region?
The area of the graph where all constraints are satisfied is the feasible solution zone or feasible region. It might also be thought of as the point where each constraint line's valid regions intersect. Any decision in this region would lead to a workable resolution for our objective function.
Vertices of the Feasible Region
As it can be seen in the graph, the vertices of the feasible region surrounded by the given constraints are:
(-14, -11), (9, -11) and (6, 4)
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pls can solve this question . thanks
Determine whether AB and CD are parallel, perpendicular, or neither. A(-3, 2), B(5, 1), C(2, 7), D(1, -1)
Answer:
perpendicular
Step-by-step explanation:
We'll find the slope of both lines and see what it tells us.
If the slopes are the same, the lines are parallel. If the slopes are opposite sign and flipped (negative reciprocals) then they are perpendicular.
The slope is y-Y on top of a fraction and x-X on the bottom.
Slope of AB:
m = 2-1 / -3 -5
= 1/-8 = -1/8
Slope of CD:
m = 7- -1 / 2-1
= 8/1 = 8
Since the slopes are -1/8 and 8, the lines are perpendicular, because they are opposite sign and flipped (negative reciprocals)
please help me!! i don’t understand this like at all this is algebra btw
The length and width of the fence should be made 76.25 feet and 23.75 feet respectively. Also, the expression for the length is L = 3W + 5 and the perimeter is P = 2(4W + 5).
How to determine the fence's dimension?Mathematically, the perimeter of a rectangle can be calculated by using this formula;
P = 2(L + W)
Where:
P is the perimeter of a rectangle.L is the length of a rectangle.W is the width of a rectangle.Since the length of this fence is 5 more than 3 times the width, we have:
L = 3W + 5
Substituting the given parameters into the formula, we have;
200 = 2(3W + 5 + W)
200 = 2(4W + 5)
200 = 8W + 10
8W = 190
W = 190/8
W = 23.75 feet.
For the length, we have:
L = 3W + 5
L = 3(23.75) + 5
L = 76.25 feet.
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Fill in the blank with a number to make the expression a perfect square. v^(2)-10v+
The number makes the expression a perfect square trinomial is 25.
Hence, we have v² - 10v + 25.
What number makes the expression a perfect square?
Given the expression; v² - 10v
To determine the number that makes the expression a perfect square trinomial, we divide the coefficient of v by 2 and square the result.
( -1 × 10/2 )²
(-1 × 5)²
( -5 )²
25
We add 25 to the expression to get a perfect square trinomial.
v² - 10v + 25.
Therefore, the number makes the expression a perfect square trinomial is 25.
Hence, we have v² - 10v + 25.
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What is the value of the expression below when y = 4?
Answer:
6y²-7y+9
Submit Answer
8⁄9 ÷ 1⁄3 what is the answer please
Answer:
8/3
Step-by-step explanation:
8/9
Write the following powers of 6 exponential form: 6 x 6
The exponential form of 6 × 6, is written as: 6².
How to Write an Expression in Exponential Form?Repeated multiplication involving base exponents and base can be written in exponential form, such as: a × a × a = a³.
Given the expression, 6 × 6, the number 6 will be the base while 2 will be the exponent if we want to express it in exponential form. Therefore:
6 × 6 = 6².
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What is an equation of the line that passes through the points (6, 4) and(6,−6)?
Answer:
Step-by-step explanation:
Use the distance formula to find the length of the segment C(2, 1) to
D(5,6). Round your answer to two decimal places.
Answer: 5.83
Step-by-step explanation:
[tex]\sqrt{(2-5)^2 + (1-6)^2}=\sqrt{34} \approx 5.83[/tex]
Solve equation -1/9 / (-1/3)
Answer: 1/3
Step-by-step explanation:
-1/9 / -1/3 = ?
Keep: -1/9
Change: *
Flip: -3/1
Solve: -1/9 * -3/1 = 3/9
Simplify: 1/3
[tex]\huge\text{Hey there!}[/tex]
[tex]\huge\textbf{Equation:}[/tex]
[tex]\mathsf{-\dfrac{1}{9}\div - \dfrac{1}{3}}[/tex]
[tex]\huge\textbf{Simplify it:}[/tex]
[tex]\mathsf{-\dfrac{1}{9}\div - \dfrac{1}{3}}[/tex]
[tex]\huge\textsf{Convert:}[/tex]
[tex]\mathsf{= -\dfrac{1}{9} \times -\dfrac{3}{1}}[/tex]
[tex]\huge\textsf{Multiply:}[/tex]
[tex]\mathsf{= \dfrac{-1\times3}{9\times -1}}[/tex]
[tex]\mathsf{= \dfrac{-3}{-9}}[/tex]
[tex]\mathsf{= \dfrac{-3 \div -3}{-9\div-3}}[/tex]
[tex]\mathsf{= \dfrac{1}{3}}[/tex]
[tex]\huge\textbf{Therefore, your answer should be:}[/tex]
[tex]\huge\boxed{\frak{\dfrac{1}{3}}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
Find the unit rate for each brand. Round to the nearest cent (hundredth).
The unit rate of each of the brands are:
Brand A's unit rate = 37 cents per ounce.
Brand B's unit rate = 31 cents per ounce.
How to Find the Unit Rate?The unit rate of each brand is simply how much a brand of tomatoes will cost per ounce.
To find the unit rate of each brand, do the following:
Brand A's unit rate = 2.99/8 = $0.37 per ounce = 37 cents per ounce.
Brand B's unit rate = 4.99/16 = $0.31 per ounce = 31 cents per ounce.
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