Question

Angles C and D are contemporary angles. Determine the measures of Angles C and D if angle D is 15 degrees less than twice angle C.

Answer 1

Let the measure of angle C = x.
Then, <D = 2x - 15.

Because the angles are complementary,

x + 2x - 15 = 90

Solve for x.

Answer 2

would it be 2x^2-15=90
+15 +15
---------------
2x^2= 105 ?..

Answer 3

or.. 3x?

Answer 4

3x=105
--- ----
3. 3
x= 35 ?

Answer 5

> x= 35 ? This is correct.

Now, we have to get the angle measures.

Answer 6

angle C = x = ?

D is 15 degrees less than twice angle C = 2x - 15 = ?

Answer 7

C= 2 (35)'15?

Answer 8

-15*

Answer 9

C= 55?

Answer 10

is 35 angle C? 0.0

Answer 11

angle C = x = 35.

D is 15 degrees less than twice angle C = 2*35 - 15 = 55

Answer 12

> is 35 angle C? YES

Answer 13

thank you for your help.