Yes, it specifies the population
90-x because a complementary angle is =90 degrees.
Answer:
-2x² + 15
Step-by-step explanation:
Step 1: Add like terms
4x² - 6x² = -2x²
-10x + 10x = 0
3 + 12 = 15
Step 2: Rewrite
-2x² + 15
Answer:
It’s prime
Step-by-step explanation:
Numbers between 2 and 31 are since these only have 1 and itself.
Answer:
21:A 22:D
Step-by-step explanation:
hope that helps