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tensa zangetsu [6.8K]
1 year ago
11

cannonball is shot into the air. its height can be described by the equation h = -5t2 + 40t, where h is the height in feet and t

is the time is seconds. when will the cannonball hit the ground?
Mathematics
1 answer:
Norma-Jean [14]1 year ago
7 0

Answer:

Step-by-step explanation:

hello :

the cannonball hit the ground when h=0

-5t² + 40t=0 means : -5t(t- 8)=0

t=8

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2 years ago
A square mirror has sides measuring 2 ft less than the sides of a square painting. If the difference between their areas is 32 f
kari74 [83]

Answer:  The side lengths of mirror and painting are 7 ft and 9 ft respectively.

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According to the given information, we have

\textup{area of painting}-\textup{area of mirror}=32\\\\\Rightarrow (x+2)^2-x^2=32\\\\\Rightarrow x^2+4x+4-x^2=32\\\\\Rightarrow  4x=28\\\\\Rightarrow x=\dfrac{28}{4}\\\\\Rightarrow x=7.

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5 0
3 years ago
Mr. johnson was paid $190 for a job that required 40 hours of work. at this rate, how much should he be paid for a job requiring
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Rashid [163]

Answer:

(3, -4)

Step-by-step explanation:

The correct equation is:

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For point (1, 4)

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Likewise, checking for 3rd and 4th point we find out that they do not lie on the graph.

So the correct answer is (3, -4)

5 0
2 years ago
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