Divide 49.2 by 6 to get 8.2, which is about 8
.25x88= 22 problems
or:
100÷25=4
so each problem would be 4 points each.
4×22=88
Grace got 22 problems correct
1. C. -512√3+512i
2. B. 16(cos240°+i sin240°)
3. D. 3√2+3√6i, -3√2-3√6i
4. A. cos60°+i sin60°, cos180°+i sin180°, cos300°+i sin300°
5. D. 2√3(cos π/6+i sin π/6), 2√3(cos 7π/6+i sin 7π/6)
Answer:
(x-1)(x+7)
Step-by-step explanation:
x = 1
x = -7
These are the roots found using the quadratic formula.