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3 years ago

D + 9 = 29 A) 38 B) 21 C) 19 D) 20

Mathematics

2 answers:

Marta_Voda [28]3 years ago

5 0

The answer would be D

Step-by-step explanation:

Just subtract 9 from 29

Once you do that you get 20

20+9=29

____ [38]3 years ago

4 0

Answer: D)20

Step-by-step explanation: 29-9=20

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3 years ago

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Given data:

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$h(t)=-16t^2+48t+288$

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

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$$t=\frac{-48\pm \sqrt{48^2-4(-16)(288)}}{2(-16)}$

$$t=\frac{-48\pm \sqrt{2304+18432}}{-32}$

$$t=\frac{-48\pm \sqrt{20736}}{-32}$

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Now, write find two t's using plus and minus operation.

$$t=\frac{-48+144}{-32},\ \ t=\frac{-48-144}{-32}$

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2 years ago

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