Question

∠1 and ∠2 are complementary.

∠1=x°

∠2=(3x+30)°

whats the value of x?

A) 15

B) 25

C) 30

D) 40

E) 55

Answer 1

If two angles are complimentary then their sum would equal to 90 degree.
i.e., x + 3x + 30 = 90
4x = 90 - 30
x = 60 / 4
x = 15

In short, Your Answer would be Option A

Hope this helps!

Answer 2

The value of x is 15 .

Option (A) is correct.

Explanation:

As given

∠1 and ∠2 are complementary.

i.e the sum of ∠1 and ∠2 is 90° .

Thus

∠1 + ∠2 = 90°

x° + (3x+30)° = 90°

x + 3x + 30 = 90

4x = 90-30

4x = 60

`x = (60)/(4)`

x = 15

Therefore the value of x is 15 .

Option (A) is correct.