The correct interpretation is Q(3) = 0; If Quincy sells 3 bracelets, he will earn $0.
What is Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given:
Q(x) = 8.25x − 24.75, where x is the number of bracelets he sells.
So, for x= 3 them Q(3)
Q(3)= 8.25 (3) - 24.75
Q(3) = 24.75 - 24.75
Q(3) = 0
Hence, Q(3) = 0; If Quincy sells 3 bracelets, he will earn $0.
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Which represents the solutions of the graphed system of equations y=x2+2x-3 and y=x-1?
Answer:
second option
Step-by-step explanation:
the solution to the system of equations is at the points of intersection of the two graphs.
the graphs intersect at (- 2, - 3 ) and (1, 0 ) , then
the solutions are (- 2, - 3 ) and (1, 0 )
Suppose that y varies directly with x, and y=4 when x = 10.
(a) Write a direct variation equation that relates and y Equation: y =
Answer:
y = 0.4x
Step-by-step explanation:
given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
to find k use the condition y = 4 when x = 10 , then
4 = 10k ( divide both sides by 10 )
[tex]\frac{4}{10}[/tex] = k , that is
k = 0.4
y = 0.4x ← equation of variation
Find the circumference and the area of a circle with diameter 7 cm.
The circumference of the circle is 21.98cm and the area of the circle is 38.465 square cm.
Circumference of the circle:
The Circumference (also known as) perimeter of circle = 2πR
where,
R is the radius of the circle
π is the mathematical constant with an approximate value is 3.14.
Area of circle:
The formula to find the area of the circle is;
A = πr²
Where r represents the radius of the circle.
Given,
The diameter of the circle is 7 cm.
Here we need to find the circumference and the area of a circle.
Here we have the value of diameter, in order to find the circumference we have to find the value of radius that can be derived by dividing the diameter by 2.
So, the radius is
=> 7/2 = 3.5
Now the circumference of the circle is calculated as,
C = 2 x π x 3.5
When the value of π = 3.14
Therefore, the circumference of the given circle is,
=> C = 2 x 3.14 x 3.5
=> C = 21.98
Now, the area of the circle is,
=> A = π x (3.5)²
=> A = 3.14 x 12.25
=> 38.465
Therefore, the area of the circle is 38.465 square cm.
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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 200 engines and the mean pressure was 5.8 pounds/square inch (psi). Assume the population standard deviation is 1.0. The engineer designed the valve such that it would produce a mean pressure of 6.0 psi. It is believed that the valve does not perform to the specifications. A level of significance of 0.02 will be used. Find the value of the test statistic. Round your answer to two decimal places.
The value of the test statistic when the engineer has designed a valve is -2.83.
How to calculate the test statistic?From the information, the following can be deduced:
Sample mean = 5.8
Population mean = 6.0
Population standard deviation = 1
Significance level = 0.02
(Sample mean - Population mean) /(Standard Deviation / ✓200)
= (5.8 - 6.0) / (1 / ✓200)
= -0.2 ✓200
= -2.83
The value is -2.83.
It's important to note that the test statistic is the z value. This will be:
=
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what is the expected value of x? where x/p equals 0/.15, 4/.05, 8/.25, 12/.05, 16/.5
The expected value of x is 10.8
How calculate the expected value of x?Expected value is defined as the predicted value of a variable, calculated as the sum of all possible values each multiplied by the probability of its occurrence.
Given :
x| 0 4 8 12 16
p| 0.15 0.05 0.25 0.05 0.5
The expected value of x, E(x) =Σ xp
E(x) = (0×0.15) + (4×0.05) + (8×0.25) + (12×0.05) + (16×0.5)
E(x) = 0 + 0.2 + 2 + 0.6 + 8
E(x) = 10.8
Therefore, the expected value of x is 10.8
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Find the value of x.
(x + 8)
Answer:
52°
Step-by-step explanation:
This is an equilateral triangle. Therefore all the sides and angles are equal to each other.
We know that,
the sum of the interior angles in a triangle is 180° and in equilateral triangles each angle measured 60° ( 180°/3 ).
Accordingly,
x + 8 = 60
Subtract 8 from both sides.
x = 60 - 8
x = 52°
Could someone help me out?
Question: Which segments are congruent because of the reflexive property of congruence?
DT is congruent to TD.
A line segment is always equal to itself.
Given,
The figure;
We have to find the segments which are congruent because of the reflexive property of congruence.
Reflexive property of congruence;-
An angle, line segment, or shape is always congruent to itself, according to the reflexive characteristic of congruence in geometry. If angle A is an angle, then angle A is a congruent angle of angle A
Here,
DT = TD,
A line segment is always equal to itself.
So, DT is congruent to TD.
Congruence;-
If it is possible to superimpose one geometric figure on the other so that their entire surface coincides, that geometric figure is said to be congruent, or to be in the relation of congruence.
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A recent survey reported that 67% of Americans approve of human embryonic stem cell research. If an American is selected at random, find the probability that he or she will disapprove or have no opinion on the issue.
If an American is selected at random, the probability that he or she will disapprove or have no opinion on the issue is 33%.
How to find the probability?Given data:
Approved human embryonic stem cell research = 67% or 0.67
Now let find the probability that the human embryonic stem cell research will be disapprove using this formula
P(disapprove or no opinion) = 1 - Approved
Let plug in the formula
P(disapprove or no opinion) = 1 - 0.67
P(disapprove or no opinion) = 0.33 or 33%
Therefore 33% is the probability of disapprove or no opinion.
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If you double a number and then add 16 you will get 2/5of the original number. What is the original number?
Step-by-step explanation:
x = the original number
2x + 16 = 2/5 x
multiply both sides by 5 to get rid of the fraction :
10x + 80 = 2x
divide both sides by 2 :
5x + 40 = x
subtract x from both sides :
4x + 40 = 0
divide everything by 4 :
x + 10 = 0
subtract 10 from both sides :
x = -10
Answer : x = -10
Step-by-step explanation :
x = original number
2x + 16 = 2/5x
Change 2/5 to decimal
2x + 16 = 0,4x
Change the position of 16 and 0,4x
2x - 0,4x = -1
Subtract 2 by 0,4
1,6x = -16
Divide -16 by 1,6
x = -10
You can use this way or the other one but this way is faster than the others
Hope it helps !
For each equation, determine whether it represents a direct variation, an inverse variation, or neither.
Find the constant of variation when one exists and write it in simplest form.
The equation 4y = -x is a direct variation and k = - 1 / 4.
The equation 3x = 2y - 7 is neither a direct variation nor a inverse variation.
How to solve direct and inverse equation?Direct variation describes a simple relationship between two variables . We say y varies directly to x when it is represented as follows:
y = kx
where
k = constant of proportionalityTherefore,
4y = - x
divide both sides of the equation by 4
4y / 4 = -x / 4
[tex]y =- \frac{x}{4}[/tex]
Therefore, the equation is direct variation and the value of k is - 1 / 4.
For two quantities with inverse variation, as one quantity increases, the other quantity decreases. Inverse variation is represented as follows:
y = k / x
Therefore, 3x = 2y - 7 is neither an inverse nor a direct variation.
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helppppppppppppppppppppp
Answer:
1) find the point on the function where it crosses the x-axis
2) find the set of values where x = 0
3) set x = 0 and solve for y; then put the two values into a coordinate pair
Last year when the 6th graders attended camp the ratio of boys to girls was 4:6. If there were 50 more girls how many boys attended camp?
By using concept of ratio, it can be calculated that
100 boys attended the camp
What is ratio?
Ratio between two numbers determines how much one number is greater than the other.
The first part of the ratio is called antecedent and the second part of the ratio is called consequent.
Here, concept of ratio will be used
Let the number of boys be 4x and the number of girls be 6x
There were 50 more girls than boys
By the problem,
6x - 4x = 50
2x = 50
[tex]x = \frac{50}{2}[/tex]
x = 25
Number of boys who attended the camp = 4 [tex]\times[/tex] 25 = 100
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The frequency table gives information about the numbers of mice in some nests
answer:
we need the table.
Is this the right answer?
Answer:
Step-by-step explanation:
Yeah you have the correct answer.
In the original line you solve for y where the slope is given -3.
Then it is up to you but I like using the point slope formula so I'll plug in the values and the result is the same as the picture.
y-y=m(x-x)
y-(-6)=-3(x-1)
Construct a 98% confidence interval based on the data. Assume the variable is normally distributed
The 98% confidence interval limits are given by 1.6 < μ < 33.7.
What is the confidence interval in statistics?
A confidence interval is the mean of your estimate plus and minus its variation. Within a certain confidence level, this is the range of values you expect your estimate to fall between if you redo your test. In statistics, confidence is another word for probability.
Given data: 10, 32, 24, 0, 5, 27, 5, 50, 6.
Sample mean = ∑x/n = 159/9 = 17.66
Sample variance = s² = ∑(x - sample mean)²/n-1
= 2206/8
= 275.75
Sample standard deviation = s = [tex]\sqrt{s^2}[/tex]
= [tex]\sqrt{275.75}[/tex]
= 16.60
Significance level = α = 1 - 0.98 = 0.02
Degree of freedom (d.f.) = n - 1 = 9 - 1 = 8
Critical value = [tex]t_{{\frac{\alpha}{2}},d.f}[/tex]
= 2.896
Margin of error = E = critical value * [tex]\frac{s}{\sqrt{n} }[/tex]
= 16.03
Limits of 98% confidence level are given by:
Lower limit = sample mean - E = 17.66 - 16.03 ≈ 1.6
Upper limit = sample mean + E = 17.66 + 16.03 ≈ 33.7.
Hence, the 98% confidence interval limits are given by 1.6 < μ < 33.7.
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write 10 forms for 1 over 8 as you can think of, be creative and use positive and negative powers or other forms of number.
The 10 forms 1/8 can be written is as follows;
1/81 ÷ 81/2³1/√64[tex]{8}^{ - 1} [/tex][tex]{√64}^{ - 1} [/tex]1 : 8[tex]{2}^{ - 3} [/tex]2/164 : 32How to write 1/8 in different forms?A fraction refers to a number which consists of a numerator and a denominator.
A numerator is the upper value of a fraction.
A denominator is the lower value of a fraction.
1 over 8 can be written in the following ways;
1/8
1 ÷ 8
1/2³
= 1 / 2×2×2
= 1/8
1/√64
= 1/8
[tex]{8}^{ - 1} [/tex]
= 1/8
1 : 8
= 1/8
[tex]{√64}^{ - 1} [/tex]
= 1/√64
= 1/8
[tex]{2}^{ - 3} [/tex]
= 1/2³
= 1/8
2/16
= 1/8
4 : 32
= 4/32
= 1/8
In conclusion, 1/8 can be written in different forms including using square root and ratios.
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Write an equation for the trend line shown on the scatter plot. ASP
Answer:
y=5x+15
Step-by-step explanation:
the equation of a line is y=mx+b where b is the y-intercept and m is the slope.
if you look at the graph you will see that your line intecpts the y axes at b=15 or that would be your y value where the line touches the edge.
now you just have to find your slope. slope is y/x or rise/run
so by looking at the graph at where our line touches the corner of a square. we just need to find 2 of those. we can use (0,15) and (1,20) the distance from 15 to 20 is 5 so that is our rise or change in y. the distance from 0 to 1 is 1 so that is our change in x or run. now just put rise over run so 5/1 which is just 5.
lastly we fill out our equation y=mx+b
our slop m is 5 and our y-intercept b is 15 so y=5x+15
I need help with this Question.
Answer:
Step-by-step explanation:
a. 1 hectare = 2.471 acres
6 hectares x (2.471 acres / 1 hectare)
=14.826 acres
b. prices per acre: 150,000/14.826
=10,117.36 per acre
A 800 g of rock was analysed and
found to contain 58 g of gold. What
percentage of the rock is the gold?
Answer:
7.25 %
Step-by-step explanation:
58 out of 800g is 58 / 800 = .0725 which is 7.25 %
5 red beads,3 blue,4 green probability of a blue bead
Answer:
3/12 or 40%
not 10000% sure on this tho
Choose the equation for the red graph
The equation of the red graph is (d) y - 3 = f(x)
Graph
Graph means the pictorial representation of statistical data or of a functional relationship between variables.
Given,
Here we have the graph with black and red lines in it.
Now, we need to find the equation for the red line.
While we looking through the potions we have identified that the first two options are not in the proper equation form.
So, we have to check only the (c) and (d) equation, to identify which one is the suitable one.
In order to find the correct function, we have to identify the points in it.
Here we have the points in the red line are (-6,1), (-2,4) and (-1,-4)
Now, we have to apply these values on the equation to find which one will produce the correct x value for the given y value,
First, we have to take the option (c) y + 3 = f(x)
-6 + 3 = 1
-3 ≠ 1
So, this one is not applicable.
Next, we have to take the function (d) y - 3 = f(x)
When we apply the value on it,
-1 -3 = -4
-4 = -4
Therefore, this is the function for the given graph.
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Find the quotient.
2.4)7.68
Answer:0.3125
Step-by-step explanation:
none sry
PLEASE HELP!! PLEASE I WILL GIVE YOU BRAINLIST!! PLEASE ASAP :)
LMNP is rotated 180° clockwise about the origin.
What are the coordinates of M' ?
Answer:
M'(-3, -4)
Step-by-step explanation:
the coordinate rules for a rotation of 180 degrees is (x, y) --> (-x, -y)
Basically, you just change both values (x and y) of M to negative. Then bam, u got the coordinates for M'
According to the graph provided, the weight for someone who is 1.4 meters tall is predicted to be close to kilograms
According to the scatterplot (graph) provided, the weight for someone who is 1.4 meters tall is predicted to be 34.8 kilograms.
What is a scatterplot?A scatterplot is also referred to as scatter diagram, scattergram, or scatter chart and it can be defined as a type of graph which is used for the graphical representation of the values of two (2) variables, with the resulting points showing any association between the data set.
For this exercise, the height (M) was plotted on the x-axis of the scatterplot (graph) while the weight (in kg) would be plotted on the y-axis of the scatterplot (graph).
From the scatterplot which models the relationship between the height (M) and weight (in kg) of a person, an equation for the line of best fit is given by:
Weight, kg = -114.3 + 106.5M
When M = 1.4 meters, we have the following weight:
Weight, kg = -114.3 + 106.5(1.4)
Weight, kg = -114.3 + 149.1
Weight, kg = 34.8 kg.
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Complete Question:
According to the graph provided, the weight for someone who is 1.5 meters tall is predicted to be close to ____ kilograms.
(MARKING BRAINLIEST) Sam works as a salesman and earns 5.5% commission on everything he sells if Sam sells a television for $1200 how much commission will he earn ?
Answer:
$66
Explanation:
Sam earns a 5.5% commission on everything he sells. He sells a television for $1200. What is 5.5% of $1200?
Convert 5.5% to decimal form: 0.055. Now, multiply 1200 by 0.055.
Sam will earn $66 because 5.5% of 1200 is 66.
Which of the three triangles below can be proven congruent by SSS or SAS
Answer:
The answer for number 7 is A
Step-by-step explanation:
I hope this helps
Which point could be used to find f(2)?
A
B
C
D
Point A will represent the input-output values of the function.
What is number line ?
Number line is virtual representation of numbers along with coordinates axis with number equally spaced with equal number of interval.
In the graph of y = f(x),
For every x-value (input value), value of the function is the y-value (output value).
For the input value x = 2,
Output value of the function will be,
y = f(2)
Therefore, point A will represent the input-output values of the function.
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Is this how I do a sign analysis table? I’m not sure if I should include the x^2…
Answer:
I believe there is supposed to be something in the the corner box (Top left).
Step-by-step explanation:
Movies at the rental store are $3.75 each. Snacks and drinks are $1.89 each. Round each amount to the nearest dollar to estimate the cost to rent 3 movies and buy popcorn, a soda, and a candy bar.
Answer: List all of the solutions.
3.75
=
1.89
=
dollar
=
3
=
Step-by-step explanation:
Consider the following quadratic equation:
49x2=64
Using the standard form ax2+bx+c=0 of the given quadratic equation, factor the left hand side of the equation into two linear factors.
⇒ let us first write the given equation in the form
[tex]ax^{2} +bx+c=0[/tex]
⇒[tex]49x^{2} -64=0[/tex]
⇒ Note in this case bx=0
Let us factorize the equation...49 is a square number and 64 is also a square number ..This equation is a difference of two squares which can be written as:
[tex](7x-8)(7x+8)=0[/tex]
⇒The answer is (7x-8)(7x+8)=0