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GREYUIT [131]
2 years ago
8

Which expression is equal to 5, ? A 542 B. 51 Cw D. 254

Mathematics
1 answer:
nirvana33 [79]2 years ago
3 0

Answer:

don't understand the full question

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A ball is kicked in the air. The height of the ball can be calculated using the equation h(t) =-16t^2+64t+190, where h is in hei
gregori [183]

Answer:

Therefore the ball strikes the ground  5.98 s after kick.          

Step-by-step explanation:

Given that , a ball is kicked in the air. The height of the ball can be calculated using the equation h(t)=-16t^2+64t+190    where h is height in feet and t is time in second.

When the ball touches the ground then the height will be zero.

i.e h(t)=0

Therefore

-16t^2+64t+190=0

\Rightarrow -2(8t^2-32t-95)=0

Since -2≠0 then (8t^2-32t-95)=0

(8t^2-32t-95)=0    

[The solution of a quadratic equation ax²+bx+c=0 is

  x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}  here a=8, b=-32 and c=-95]                    

\Rightarrow t =\frac{-(-32)\pm\sqrt{(-32)^2-[4\times8\times(-95)]} }{2\times8}        

\Rightarrow t =\frac{32\pm\sqrt{4064} }{16}    

Therefore   t=  5.98 or -1.98

since time can not be negative So , t=5.98 s

Therefore the ball strikes the ground  5.98 s after kick.          

5 0
3 years ago
There are 50 kids at the park 30 of the girls what percent of the kids are boys
Flauer [41]

Answer:

40 %

Step-by-step explanation:

3 0
3 years ago
Yoko received a $70 gift card for a coffee store. She used it in buying some coffee that cost $7.37 per pound. After buying the
GREYUIT [131]

Answer:

Yoko bought 5 pounds of coffee.

If you want the steps, let me know. Hope this helps!!

Step-by-step explanation:

6 0
3 years ago
What is the greatest common factor of 7ab and 8b^3
Vlad [161]

Answer:

b

Step-by-step explanation:

The greatest common factor is the largest value two numbers share in common which multiplies to each of the numbers.

7ab has factors 7, a, b

8b^3 has factors 2, 4, 8, b, b, b

These share in common b.

3 0
3 years ago
-4 plus the square root of 81​
almond37 [142]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ The square root of 81 is 9

We have -4 + 9

Thus, your answer is 5

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

6 0
2 years ago
Read 2 more answers
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