Answer:
480
Step-by-step explanation:
So we have the expression:
[tex]-8(2z-70)[/tex]
And we want to evaluate it for z=5 and c=2:
So:
[tex]=-8(2(5)-70)[/tex]
Multiply within the parentheses:
[tex]=-8(10-70)[/tex]
Subtract within the parentheses:
[tex]=-8(-60)[/tex]
Multiply:
[tex]=480[/tex]
Answer:
480
Step-by-step explanation:
-8( 2(5) - 70)
-8 ( 10 - 70)
-80 + 560
480
A line passes through the points (−4, −18) and (0, 2). Which is an equation of the line?
Answer:
y=5x+2
Step-by-step explanation:
First of all, remember what the equation of a line is:
y = mx+b
Where:
m is the slope, and
b is the y-intercept
First, let's find what m is, the slope of the line...
The slope of a line is a measure of how fast the line "goes up" or "goes down". A large slope means the line goes up or down really fast (a very steep line). Small slopes means the line isn't very steep. A slope of zero means the line has no steepness at all; it is perfectly horizontal.
For lines like these, the slope is always defined as "the change in y over the change in x" or, in equation form:
So what we need now are the two points you gave that the line passes through. Let's call the first point you gave, (-4,-18), point #1, so the x and y numbers given will be called x1 and y1. Or, x1=-4 and y1=-18.
Also, let's call the second point you gave, (0,2), point #2, so the x and y numbers here will be called x2 and y2. Or, x2=0 and y2=2.
Now, just plug the numbers into the formula for m above, like this:
m= (2 - -18)
------------
(0 - -4)
or...
m= 20
-------
4
or...
m=5
So, we have the first piece to finding the equation of this line, and we can fill it into y=mx+b like this:
y=5x+b
Now, what about b, the y-intercept?
To find b, think about what your (x,y) points mean:
(-4,-18). When x of the line is -4, y of the line must be -18.
(0,2). When x of the line is 0, y of the line must be 2.
Because you said the line passes through each one of these two points, right?
Now, look at our line's equation so far: y=5x+b. b is what we want, the 5 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the two points (-4,-18) and (0,2).
So, why not plug in for x and y from one of our (x,y) points that we know the line passes through? This will allow us to solve for b for the particular line that passes through the two points you gave!.
You can use either (x,y) point you want..the answer will be the same:
(-4,-18). y=mx+b or -18=5 × -4+b, or solving for b: b=-18-(5)(-4). b=2.
(0,2). y=mx+b or 2=5 × 0+b, or solving for b: b=2-(5)(0). b=2.
See! In both cases we got the same value for b. And this completes our problem.
The equation of the line that passes through the points
(-4,-18) and (0,2)
is
y=5x+2
Question 8 The measurements of the length and width of a rectangular kitchen are 5.34 m and 3.48 m respectively. a Calculate in m² the exact area of the kitchen. b Write down both the length and the width correct to 1 dp. just answer b
Answer:
a) 18.5832 m^2
b) length 5.34 ≈ to one decimal point 5.3m
width 3.48 ≈ to one decimal point 3.5m
Step-by-step explanation:
TIMED QUESTION!!!!!!!
Answer: (2 1/2, 0) (the last option)
Step-by-step explanation:
I guess the function is:
f(x) = (2 1/2) - (3 1/2)*x
now, the rule for f-1(x) that we know is:
f-1( f(x) ) = x.
So if we want to find the x-intercept of f-1(x), we must evaluate it in f(0)
f-1(f(0)) = 0.
And we have that f(0) = (2 1/2) - (3 1/3)*x = 2 1/2
This means that the x-intercept of f-1(x) will be when x= 2 1/2, so the intercept is:
(2 1/2, 0)
is -6/11 a rational or irrational number?
Answer: I am pretty sure it is a rational number!
Step-by-step explanation:
How do I express 32 kilometeters in miles?
Answer:
19.84 Miles
give or take
Step-by-step explanation:
1 km is .62 miles
.62 x 32 = 19.84
Answer:
19.88 miles
Step-by-step explanation:
Write the equation of the line that passes through the points (-7, -5) and
(-7,–7). Put your answer in fully reduced point-slope form, unless it is a vertical or
horizontal line.
Answer:
vertical
Step-by-step explanation:
Why is the sum of a rational number and a irrational number always irrational
Answer:
A rational number is a number able to be put into a fraction, an irrational number is not able to be. Therefore, when adding the two, the rational and the irrational will be irrational. For example, 2 is a rational number, and 1.8903 is irrational. If you add the two, you will get 3.18903, which is unable to be put into a fraction.
Josh takes a load of dress shirts to the dry cleansers the amount he pays for dry cleaning (f) is given by the equation f=3-2s where is the number of shirts what is the constant of proportionally in terms of the cost per shirt
Answer:
s= number of shirts
3/2= constant of proportionality
Step-by-step explanation:
Josh takes a load of dress shirts to the dry cleaners. The amount he pays for dry cleaning (
f. is given by the equation f=3/2s, where s is the number of shirts. What is the constant of proportionality in terms of the cost per shirt?
Given:
f= 3 / 2s
Where,
f= amount Josh paid for dry cleaning
s= number of shirts
3= constant of proportionality
2= amount paid per shirt
For example, if Josh took 3 shirts to the dry cleaner, the amount Josh will pay is
f= 3 / 2s
= 3 / 2(3)
= 3 / 6
= 1 / 2
f= 1 /2
What is the solution for this inequality? 8x ≤ -32
Answer:
x≤-4
Step-by-step explanation:
There is one very important exception to the rule that multiplying or dividing an inequality is the same as multiplying or dividing an equation. Whenever you multiply or divide an inequality by a negative number, you must flip the inequality sign.
8x≤-32
1. Divide both sides by 8
if 5 a solution of 3x + 30 = 9x?
Answer:
5 is a solution
i need help , what’s the answer ?
Answer:
D,
Step-by-step explanation:
that's because you only factorise when you have a common factor, ax-3b cannot be factorised because they have nothing in common so it is wrong to use x to factorise it. If you want to be sure that it is not factorisable, try expanding it and you'll see that you will not get the same answer.
Horatio went to the movies and spent $15 on his ticket and snacks. If the snacks cost $8, how much did his ticket cost? -Answer?
Answer:
$7
Step-by-step explanation:
t = ticket price
We know the total cost of the ticket and snacks was $15, and just the snacks were $8 so:
t + $8 = $15
To find the amount of the ticket, subtract $8 from each side
t + $8 - $8 = $15 - $8
The $8 cancels and you're left with
t = $7
So the ticket costs $7
The remaining cost after the snack cost is the cost of the movie ticket and it is $7.
What is subtraction?To subtract in mathematics is to take something away from a group or a number of objects.
In a different sense, subtraction refers to a mathematical procedure where two values will be subtracted to produce a new value.
Total spent = cost of snacks + cost of a movie ticket
Given that,
Total spent = $15
Cost of snacks = $8
So,
15 = 8 + cost of movie ticket
Cost of movie ticket = 15 - 8 = $7
Hence "The remaining cost after the snack cost is the cost of the movie ticket and it is $7".
For more about subtraction,
https://brainly.com/question/1927340
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Solve the following simultaneous equations : with the help of steps
1. x + 2y = 1, 3x - y = 17
Answer:
x = 5, y = -2
Step-by-step explanation:
Given equations:
x + 2y = 13x - y = 17From the first equation we get:
x = 1 -2ySubstitute x in the second equation, find y:
3x - y = 173*(1-2y) - y = 173 - 6y - y = 17-7y = 17 - 3-7y = 14y = -14/7y = -2Find x:
x = 1 - 2y x = 1 - 2*(-2)x = 1 + 4x = 5Fill in the blank with a constant, so that the resulting quadratic is the square of a binomial. \[x^2 + \dfrac{4}{5}x + \underline{~~~~}\]
Answer:
4/25Step-by-step explanation:
Given the incomplete quadratic equation [tex]\[x^2 + \dfrac{4}{5}x + \underline{~~~~}\][/tex], we are to complete it so that the result will be the square of a binomial. To do that, we will use the completing the square method.
Completing the square method is a way of completing a quadratic equation by solving for a constant to add that will make the quadratic equation a perfect square of a binomial.
To get the constant term using the method, we will take the square of the alf of the coefficient of x in the equation given.
Coefficient of x = 4/5
half of the coefficient of x = 1/2(4/5)
half of the coefficient of x = 4/10 = 2/5
Square of the half of the coefficient of x = (2/5)²
Square of the half of the coefficient of x = 4/25
Hence the constant that we will use to complete the equation to make if a square of a binomial is 4/25
The equation will become:
[tex]= \[x^2 + \dfrac{4}{5}x +\dfrac{4}{25} \\\\= \[x^2 + \dfrac{4}{5}x +(\dfrac{2}{5})^2\\\\= (x +\dfrac{2}{5})^2[/tex]
Hence the constant value that will make the resulting quadratic the square of a binomial is 4/25
Answer:
4/25
Step-by-step explanation:
Suppose the quadratic is the square of the binomial $x+c.$ We have $(x+c)^2 = x^2+2cx + c^2.$ Comparing the linear term of $x^2 + 2cx+c^2$ to the linear term of $x^2 + \frac{4}{5}x + \underline{~~~~},$ we have $2c = \dfrac{4}{5},$ so $c = \dfrac{2}{5}.$ Therefore, the constant term is
\[c^2 = \left(\dfrac{2}{5}\right)^2 = \boxed{\frac{4}{25}}.\]
The amount of a certain medication remaining in the bloodstreamt
hours after taking the medicine is modeled by the equation M(t) = -4**
5x2 + 3x +18. Package directions recommend taking a second dose 4-6
hours after the initial dose,
Answer:
45, 46, 33, 0, 6
Step-by-step explanation:
A comparison of two quantities with similar units, by division is called: *
1.ratio table
2.rate
3.ratio
4.origin
25=19+k. What’s the answer?
Answer:
k=6
Step-by-step explanation:
25=19+k
Subtract 19 from each side
25-19=19-19+k
6 = k
Answer:
k = 6
Explanation:
to find the value of k in the equation provided, you must subtract nineteen from both sides. this will isolate the variable.
25 = 19 + k
25 - 19 = 19 - 19 + k
6 = k
k = 6
therefore, the value of the variable k in 25 = 19 + k is 6.
Multiplying a number by which of the following would result in a smaller number?
O 100
O 101
O 102
10-1
Answer:
10^(-1)
Step-by-step explanation:
Recall that a value that is multiplied by a number that is between 0 and 1 will result in a number that is smaller than the original number.
the first 3 are all greater than 1, hence will result in a greater value if when multiplied with another number.
The last one is 10^(-1) = 0.1
Anything multiplied by 0.1 will result in a value that is 1/10th of the original value.
Hence this is the answer.
Answer:
10/\-1 is correct
Step-by-step explanation:
which expressions are equivalent too the square root of 252
Answer:
[tex]6\sqrt{7}[/tex]
Step-by-step explanation:
If you bring 252 to its prime numbers, its 2, 2, 3, 3, and 7. Just multiply 2 and 3 and you get 6 root 7.
The expression equivalent to the square root of 252 is 6[tex]\sqrt{7}[/tex].
What are prime numbers?That number which can be divided by itself or 1 only. eg. 2, 3, 5, 7, 11, 13 etc.
Given value,
252
Expressed in prime numbers as:
252 = 2x2x3x3x7 or [tex]2^{2}[/tex] x [tex]3^{2}[/tex] x 7
∴ [tex]\sqrt{252}[/tex] = 2x3 [tex]\sqrt{7}[/tex] = 6 [tex]\sqrt{7}[/tex]
Hence [tex]\sqrt{252}[/tex] can be expressed as 6 [tex]\sqrt{7}[/tex]. Similarly any real number can be represented as the product of prime numbers.
To learn more about prime numbers, refer to the link:
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-30=5k+5 solve for k
Answer:
The answer is -7
5k=-30-5.
5k=-35.
k= -7.
Hi there! Hopefully this helps!
---------------------------------------------------------------------------------------------------
Answer: [tex]\boxed{k = -7}[/tex] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[tex]-30=5k+5[/tex]
Swap sides so that all variable terms are on the left hand side.
[tex]5k+5=-30[/tex]
Subtract 5 from both sides.
[tex]5k=-30-5[/tex]
Subtract 5 from −30 to get −35.
[tex]5k=-35[/tex]
Divide both sides by 5.
[tex]k=\frac{-35}{5}[/tex]
Divide −35 by 5 to get, you guessed it, -7!You can also do "5(-7) + 5 = ??" For proof.
6 tenths+3 thousandths
Determine whether each ordered pair is a solution of y = x+3. (2,5) (4,6) (5,8) (3,7)
Answer:
(2,5) and (5,8)
Step-by-step explanation:
you can just plug in the numbers to get your answer and if two numbers aren't the same then its not a solution
example: (2,5)
5 = 2 + 3
5 = 5
5 does equal 5 making it a solution because it makes sense right?
example: (4,6)
6 = 4 + 3
6 = 7
this isn't a solution because six doesn't equal 7
Answer:
[see below]
Step-by-step explanation:
[tex]y=x+3[/tex]
(2,5):[tex]5=2+3\\\\\boxed{5=5}[/tex]
The ordered pair is a solution.
(4,6):[tex]6=4+3\\\\\boxed{6\neq7}[/tex]The ordered pair is not a solution.
(5,8):[tex]8=5+3\\\\\boxed{8=8}[/tex]The ordered pair is a solution.
(3,7):[tex]7=3+3\\\\\boxed{7\neq 6}[/tex]
The ordered pair is not a solution.
Hope this helps.
If B is the midpoint of AC, AC=CD, AB=3x+4, AC=11x-17, and CE=49, find DE.
Answer:
11
Step-by-step explanation:
AB = 3x + 4 and AC which is twice of AB is equal to 11x - 17
2 (3x + 4) = 11x - 17
6x + 8 = 11x - 17
8 + 17 = 11x - 6x
25 = 5x
5 = x
AC = CD = 11x - 17 ➡ 11×5 - 17 = 38
CD = 38 and DE = 49 - 38 = 11
is pie a natural number?
Nope
Step-by-step explanation:
Pi is an irrational number because it can not be expressed by a simple fraction.
Answer: No it's a rational number
Step-by-step explanation:
d) Make a is the subject of the formula, ab + bc = ad
e) Define Pythagoras' Theorem.
Answer:
(D) ab + bc =ad
ab-ad = -bc
a(b-d) =bc
a = bc / b-d
(e) The Pythagoras Theorem states that in a Right angled triangle the {hypotenuse}^2 = {opposite}^2 + {adjacent}^2
Step-by-step explanation:
what is 5+10/5 i cant find the answer
we'll divide 10 by 5..the answer is 2 then we'll add it to the other 5 making it to be 7
Answer: 7
How to: To add fractions, find the LCD and then combine.
If their is 300 unicorns and 200 dragons and 50 dragons fly away then 30 unicorns walk away how many are of each left?
Pls help.
Answer:
If 30 unicorns out of 300 walk away then it will be 300-30=270 unicorns left.
If 50 dragons fly away out of 200 then it will be 200-50=150.
Therefore there are 270 unicorns and 150 dragons left.
I hope this helps you...Thank you...
A new community sports complex is being build in Madison. The perimeter of the rectangular playing field is 466 yards. The length of the field is 7 years less than quadruple the width. What are the dimensions of the playing field?
Answer:
The dimensions of the field is 185 yards by 48 yards
Step-by-step explanation:
Here, we are interested in calculating the dimensions of the field.
Let the width of the field be x yards
From the question, we are made to know that the length of the field is 7 yards less than quadruple ( 4 times) the width
So mathematically, the length of the field will be ;
(4x -7) yards
The perimeter of the field mathematically is:
2(l + b)
Thus;
2(x + 4x- 7) = 466
2(5x -7) = 466
divide both side by 2
5x - 7 = 466/2
5x - 7 = 233
5x = 233 + 7
5x = 240
x = 240/5
x = 48 yards
Length of field is; 4x -7 = 4(48) -7 = 192 - 7 = 185 yards
Find the midpoint of R(2,2) and S(-3,6)
Answer: (-0.5, 4)
Step-by-step explanation:
Midpoint formula: [tex](\frac{x1+x2}{2} ,\frac{y1+y2}{2} )[/tex]
(x1, x2)=(2, -3)
(y1, y2)=(2, 6)
-----------------------------------------------
[tex](\frac{x1+x2}{2} ,\frac{y1+y2}{2} )[/tex]
=[tex](\frac{2-3}{2} ,\frac{2+6}{2} )[/tex]
=[tex](\frac{-1}{2} ,\frac{8}{2} )[/tex]
=[tex](-0.5, 4)[/tex]
Hope this helps!! :)
Please let me know if you have any question or need further explanation
Answer:
[tex]M=(-\frac{1}{2},4)[/tex]
Step-by-step explanation:
The midpoint formula is given by:
[tex]M=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})[/tex]
Let (2,2) be x₁ and y₁ and let (-3,6) be x₂ and y₂. Therefore:
[tex]M=(\frac{2+-3}{2},\frac{2+6}{2})[/tex]
Simplify:
[tex]M=(-\frac{1}{2},\frac{8}{2})\\M=(-\frac{1}{2},4)[/tex]
Old Mc Donald raises ducks and cows. The animals have a total of 100 heads and 354 feet. How many ducks and how many cows does Old Mc Donald have?
Answer:
The number of ducks Old Mc Donald raises are 23 and the number of cows Old Mc Donald raises are 77.
Step-by-step explanation:
We are given that Old Mc Donald raises ducks and cows. The animals have a total of 100 heads and 354 feet.
Let the number of ducks Old Mc Donald raises be 'x' and the number of cows Old Mc Donald raises be 'y'.
So, according to the question;
The first condition states that the animals have a total of 100 heads, that means;[tex]x+y=100[/tex]
[tex]x=100-y[/tex] -------------------- [equation 1]
{because one head of a duck and one head of cow}
The second condition states that the animals have a total of 354 feet, that means;[tex]2x+4y=354[/tex]
[tex]x+2y=177[/tex] --------------- [equation 2]
{because there are two feet of a duck and four feet of cow}
Now, putting the value of x in equation 2 we get;
[tex]100-y+2y=177[/tex]
[tex]y=177-100[/tex]
y = 77 cows
Putting this value of y in equation 1 we get;
x = 100 - y
x = 100 - 77 = 23 ducks
Hence, the number of ducks Old Mc Donald raises are 23 and the number of cows Old Mc Donald raises are 77.