Linear equations are often used to solve practical problems that have an unknown quantity. We use a suitable pronumeral to represent the unknown quantity, translate the information given in the problem into an equation, and then solve the equation using the skills acquired earlier in this chapter.

Example 11

If a number is increased by 8, the result is 25. Find the number.

Solution:

Let x be the number. Increasing x by 8 gives x + 8, which we are told is 25. Therefore, x + 8 = 25. Subtract 8 from both sides to find x = 17. So, the number is 17.

Step-by-step explanation:

I hope this helps!!!

4 0

3 years ago

Graph the image of this figure after a dilation with a scale factor of 2 centered at the origin.

zavuch27 [327]

Find ever origin and then multiplying by the <span>scale factor of 2 and i promise you will get your answer</span>

3 0

3 years ago

Write an equation for a line that passes through (-4,8) and 8,-1

KatRina [158]

Slope is change in y over change in x.

Change in y is -9
Change in x is +12

So -9/12 or -2/3

Answer -2/3

5 0

3 years ago