Answer:
Step-by-step explanation:
the sum of 5x+20= 5(x+4)
and the opposite of 20 is negtive 20
Answer:
32
Step-by-step explanation:
If he has 26 now, he had 16 before he bought the 10 more. If he had 16, he would have had 32 before he sold half of them
The formula for finding the area of the circle works because they made it especially for it. I don’t really know how else to describe it, it simply just works.
f(x) = 20x² - 18x - 25
f(-1) = 20(-1)² - 18(-1) - 25
= 20 + 18 - 25
= 13
