Find the solution to the linear system 2x+3y=13 -2x+4y=8

x=2 y=3

step-by-step explanation:

you can use substitution or elimination, whichevers easier tbh

let's take a look at the 2nd one

-2x+4y=8 we can just add 2x to both sides to get rid of the -2x

+2x       +2x

4y=8+2x now we can divide by 4 to get rid of the 4 in the 4y

once we do that we get y=2+1/2x

ogey cool now we can just plug this into the y value, then simplify as you would normally

2x+3(2+1/2x) just like distribute and do whatever u have to do to solve the equation

2x+6+1.5x=13

3.5x+6=13

       -6  -6

3.5x+=7  

x=2 now we have x, we just have to find y the same way, just plug it into the equation

the answer is 48m^2!

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.