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Lera25 [3.4K]
4 years ago
10

A car company tested a sports car on a road with different inclines. The test driver tested the car by driving a distance of x m

iles on a flat road, (x2 + 3) miles downhill, and (x − 7) miles uphill. Which simplified expression is equivalent to the total distance, in miles, for which the car was tested?
Mathematics
2 answers:
galina1969 [7]4 years ago
8 0
The answer is x= -4 if that's what they asking for

KIM [24]4 years ago
5 0
C. x²+ 2x - 4 Should be your answer to this question.
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The difference of two numbers is 1. their sum is 19. find the numbers.
Umnica [9.8K]

Answer:

x = 10

y = 9

Step-by-step explanation:

First, you need to write two equations that represent the information given. I'm going to set the two numbers and x and y.

x - y = 1

x + y = 19

This turns it into a systems of equations. When you add the two equations, keeping everything on each side, you eliminate a variable, and solve for the other.

2x = 20

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Now, you'd plug x into either original equation.

(10) - y = 1

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x = 10

I hope this helped!

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