Answer:
\frac{d}{dx}\left(x^2+16x+63\right)=2x+16
Step-by-step explanation:
2x²-5x+8=0
use the quadratic formula, x=(5+√39i)/4 of x=(5-√39i)/4
looks like the second choice is correct.
(x + 3) is a factor so x = -3 must be a root.
Answer:
1. A
2. A
3. C
4. C
5. A
Step-by-step explanation:
To solve the question we shall use the formula for the range given by:
Horizontal range, R=[v²sin 2θ]/g
plugging in our values we get:
500=[160²×sin 2θ]/10
5000=160²×sin 2θ
0.1953=sin 2θ
thus:
arcsin 0.1953=2θ
11.263=2θ
hence:
θ=5.6315°~5.63
