Answer:
Hope this step-by-step helps:
Step-by-step explanation:
In a two-variable problem rewrite the equations so that when the equations are added, one of the variables is eliminated, and then solve for the remaining variable. Step 1: Multiply equation (1) by -5 and add it to equation (2) to form equation (3) with just one variable.
Answer:
80%
Step-by-step explanation:
First you subtract the 8 from 40 which leaves you with 32
Then you set up your proportion 32/40 = x/100
Cross multiply and divide which leaves you with 80
Answer:
20
Step-by-step explanation:
If you take (2x+5) (2x+5) = 0
then 4x^2 + 20x +25 = 0
