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jeyben [28]
3 years ago
14

Solve -8x + 4 ≤ 36A. x ≥ -4B. x ≤ 4C. x ≥ 4D. x ≤ -4

Mathematics
1 answer:
nexus9112 [7]3 years ago
7 0
- 8x + 4 ≤ 36
Subtract 4 from both sides.
-8x ≤ 32
Divide both sides by -8.        When dividing by a negative number change the
 x ≥  - 4                                   inequality sign.
Letter A
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Martin throws a ball straight up in the air. the equation h(t) = -16t^2 + 40t + 5 gives the height of the ball, in feet, t secon
Lisa [10]

Answer:

2.62 seconds

Step-by-step explanation:

Let

t ----> the time in seconds

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we have

h(t)=-16t^2+40t+5

we know that

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so

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The formula to solve a quadratic equation of the form

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t=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-16t^2+40t+5=0

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t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}

t=\frac{-40\pm\sqrt{1,920}} {-32}

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therefore

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4 0
3 years ago
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