Question

If the measures of two complimentary angles are 7x and 11x , then find x

X=5
X=10
X=22.5
X=12

Answer 1

as you know that sum of complementary angles equal 90°

so,

7x + 11x = 90
18x = 90
x = 90/18
x =5


so,
option A is the correct one.

Answer 2

x = 5

Explanation:

Complementary angles are two angles whose sum is 90º

So, if we have two complementary angles 7x and 11x we know that their sum is 90

We are going to write the equation and solve for x:

`7x+11x=90\\18x=90\\x=90/18\\x= 5`

Therefore, x would be 5. And the angles would be 7(5) = 35º and 11(5) = 55º