Answer:
-8
Step-by-step explanation:
10 -2b^2
Let b=-3
10 - 2( -3)^2
Do the exponent first
10 -2(9)
Multiply
10 -18
Subtract
- 8
Given
10 - 2b² ← substitute b = - 3 into the expression
= 10 - 2(- 3)²
= 10 - 2(9)
= 10 - 18
= - 8
Answer: 150 wpm
<em>if he reads 1,500 words in 10 minutes, then we simply divide 1500 by 10, in order to get how many words that he can read in one minute. </em>
1500/10 = 150
225 miles
