Angle please provide answer help!!

Question

two angels whose sum is 90 degrees are complementary angels. Find the measures of the complementary angles.

 

(7x-9)

(4x)

 

(7x-9) degrees=

(4x) degrees= 

answered must be simplified. 

Answer 1

Add the two angles and set the sum equal to 90:

 

7x - 9 + 4x = 90

11x - 9 = 90

11x = 99

x = 9

 

Now, plug in the value for x into the expressions for each angle:

 

7x - 9 = 7(9) - 9 = 63 - 9 = 54°

4x = 4(9) = 36°