Perimeter<span> and area are two important and fundamental mathematical questions</span>
Answer:
b
Step-by-step explanation:
∠ BAD = 90° and
∠ DAC + ∠ CAB = ∠ BAD, that is
x + 2x - 30 = 90
3x - 30 = 90 ( add 30 to both sides )
3x = 120 ( divide both sides by 3 )
x = 40 → b
Answer:
answer is A. cosine
Step-by-step explanation:
Answer:
The answer is -10.
Step-by-step explanation:
4 - 5 - 9
-1 - 9
-10
12/84=1/7
divide the numerator and denominator of 12/84 with 12
