F(x)=-5t^2+20t+60
Divide everything by -5
f(x)=t^2-4t-12
(t-6)(t+2)
Set it up to zero
t-6=0. t+2=0
t=6. t=-2
Since you can’t have negative seconds, the answer is 6 seconds
Remember
i²=-1 so
i³=-i
i⁴=1
so
5i⁴+2i³+8i²-4
5(1)+2(-i)+8(-1)-4
5-2i-8-4
-7-2i is the form
The first one is D
The second one is true
Answer:
- I cannot see number 4
Step-by-step explanation:
r
Answer:
34 5/6
Step-by-step explanation:
Convert the mixed numbers into improper fractions:
57/10 × 55/9
We can reduce these fractions by using the greatest common factor, 3
19/2 × 11/3
Multiply
19/2 × 11/3 = 209/6
Convert to mixed number
209/6 = 34 5/6
