The answer is A! ———————-
Answer:
Just substitute x with 3.the answer should be - 26.
Step-by-step explanation:
Answer:
A = 21 degrees
Step-by-step explanation:
Here in this question, we are told to calculate the value of angle A.
When two angles are tagged complementary, what this means is that the addition of both angles gives a total of 90 degrees.
Hence;
A + B = 90
This means that;
(x-21) + (2x -15) = 90
x + 2x -21-15 = 90
3x -36 = 90
3x = 90+ 36
3x = 126
x = 126/3
x = 42
But we are told to calculate the measure of A
A = x -21
A = 42-21
A = 21 degrees
Easy, you just replace m with 2, and when a letter is placed next to a number then it means you multiply them, therefore
6*2-1=12-1 = 11