johanna wrote the system of equations.
4x-3y=1
5x+4y=9
if the second equation is multiplied by 4, what should the first equation be multiplied by to eliminate the x-variable by addition?

The solution is x = - 3 2 , y = 4.

Step-by-step explanation:

You can solve the system by adding the 2 equations together. Explanation: Now that she has isolated a variable she needs to substitute into the first equation to get them in terms of one variable.

Your answer will be: 5

Reasoning: Due to the fact that when you multiplied the second equation by 4 your outcome was 20x+16y, so what you do is the same thing with the first equation but instead of 4 you multiply it by 5 to get 20x-15y. Hope this helps!

gdp is the best phrase!

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length