Answer:

Step-by-step explanation:
Given


Required
Equivalent form of the first equation that eliminates x when added to the second
To do this, we simply make the coefficients of x to be opposite in both equations.
In the second equation, the coefficient of x is 8.
So, we need to make the coefficient of x -8, in the first equation.

Multiply by -10
![-10 * [\frac{4}{5} x-\frac{3}{5}y=18]](https://tex.z-dn.net/?f=-10%20%2A%20%5B%5Cfrac%7B4%7D%7B5%7D%20x-%5Cfrac%7B3%7D%7B5%7Dy%3D18%5D)

<em>When this is added to the first equation, the x terms becomes eliminated</em>
Answer:
y=tanx+C
Step-by-step explanation:

5. 14 squared centimeters
6. 31 7/8 squared inches
7. 936 squared inches
8. 125 squared centimeters
9. 72 squared meters
10. 336 squared meters
11. 8.25 squared feet
12. 187.5 squared inches
13. 1,620 squared inches
14. 300 squared feet; trapezoid's equation was (10+18)6/2. For the rectangle, equation was 18x12. Add the answers together to get 300.
I hope this helped! :)