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3 years ago

(SAT PREP) Find the value of x.

Mathematics

1 answer:

PilotLPTM [1.2K]3 years ago

5 0

Answer:

x=120 is the answer it is hard to described without name

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A projectile is launched into the air. The function h(t) = –16t2 + 32t + 128 gives the height, h, in feet, of the projectile t s

Zinaida [17]

Answer:

t = 4 seconds

Step-by-step explanation:

The height of the projectile after it is launched is given by the function :

$h(t)=-16t^2+32t+128$

t is time in seconds

We need to find after how many seconds will the projectile land back on the ground. When it land, h(t)=0

So,

$-16t^2+32t+128=0$

The above is a quadratic equation. It can be solved by the formula as follows :

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

Here, a = -16, b = 32 and c = 128

$t=\dfrac{-32\pm \sqrt{(32)^2-4\times (-16)(128)} }{2\times (-16)}\\\\t=\dfrac{-32+ \sqrt{(32)^2-4\times (-16)(128)} }{2\times (-16)}, \dfrac{-32\- \sqrt{(32)^2-4\times (-16)(128)} }{2\times (-16)}\\\\t=-2\ s\ \text{and}\ 4\ s$

Neglecting negative value, the projectile will land after 4 seconds.

4 0

3 years ago

12. Three fifths of the children at my party like chocolate ice cream. How many of the 20 children at my party do not like choco

brilliants [131]

Answer:

12. if 3/5 of them like chocolate ice cream 2/5 don't and 2/5 of 20 is 8.

A=8

13. 296 divided by 8 is 37

A=37

14. 123 divided by 7 is 17.5714285714 so each child will get 17 sweets and there will be 4 left over.

A=17 remainder of 4

15. umm i don't know just multiple 4.50 by the amount of soccer balls

A=?

16. srry i don't realy know there not enough of the pattern

Brainlest please

Your Welcome

BIFFY OUT!!!

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3 years ago

5.35/46= ? i hate my mah class cane someone help me

KatRina [158]

Answer:

0.7

Step-by-step explanation:

Glad to help :)

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3 years ago

Federal, State, and local income taxes, FICA/Social Security taxes - 6.4% and Medicare taxes - 1.52% are mandatory deductions ta

natulia [17]

It would be I think it would be social science

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3 years ago

If 3/x= 4/5, then what is the value of x?<br><br>

pickupchik [31]

Answer:

3.75

Step-by-step explanation:

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3 years ago