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Volgvan
3 years ago
12

Simplify -4(x - 7) + (x + 14).

Mathematics
1 answer:
asambeis [7]3 years ago
3 0

Answer:

=−3x+42

Step-by-step explanation:

Let's simplify step-by-step.

−4(x−7)+x+14

Distribute:

=(−4)(x)+(−4)(−7)+x+14

=−4x+28+x+14

Combine Like Terms:

=−4x+28+x+14

=(−4x+x)+(28+14)

=−3x+42

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Answer:

D) 5 miles to 1 hour.

Step-by-step explanation:

If each small box is 1 mile you can count the boxes to line up with the 1 hour graph. Hence, 5 boxes to 1 hour box equals 5 miles to the hour.

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3 years ago
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Answer: A= (3,-3) . B(4,1). C= (1,0)

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3 years ago
Persons taking a​ 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a
mihalych1998 [28]

Answer:

y = 4.125x + 496.25

Step-by-step explanation:

Set the data up as points. Then deal with the points.

Givens

(30,620)

(70,785)

y2 = 785

y1 = 620

x2 = 70

x1 = 30

Formula

Slope = (y2 - y1) / (x2 - x1)

Solution

Slope = (785 - 620)/(70 - 30)

Slope = 165 / 40

Slope = 4.125

===================

Now you need the y intercept. Either one of the two given points will give you that.

y = 620

x = 30

m = 4.125

y = mx + b

620 = 4.125*30 + b

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620 - 123.75 + b

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5 0
3 years ago
What number must you add to complete the square x^-8x=39
notsponge [240]

Answer:

Given equation: x^2-8x =39

when we complete the square , we take half of the value of 8 , then square it, and added to the left sides, we get;

x^2-8x+4^2 = 39 +4^2

∵8 is the value (\frac{8}{2})^2

Notice that, we add this both sides so that it maintains the equality.

then;

x^2-8x+4^2 = 39 +4^2

(x-4)^2 = 39 + 16   [ (a-b)^2 = a^2-2ab+b^2 ]

Simplify:

(x-4)^2 =55

The number must be added to complete the square is, 4^2 = 16



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3 years ago
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The sum of two consecutive integers is 1. Find the integers.
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Answer:

1+0

Step-by-step explanation:

because your adding

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