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lesya692 [45]
3 years ago
8

I need answers to all of these. Please help!! I suck at math..

Mathematics
1 answer:
RSB [31]3 years ago
6 0
1)  (-4) + (-9) = -13 

2) 5 + (-12) = -7 

3) -6 + 5 = -1 

4) -7 + 7 = 0 

<span>5)  -7 + 2 ___ 3 + (-9)

       - 5  ____    - 6 

</span>-7 + 2  >  3 + (-9)

6)  <span>4 + (-8) ___ 6 + (-8) + (-6)  

     - 4 ____    - 8 

</span><span>4 + (-8) >  6 + (-8) + (-6)

7)  </span><span>$66

8)  </span><span>-$12
</span>
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X=number of students at Marita's high school last year
98%=.98
.98x=1170
x=1170/.98
x=1194
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Write the number in 2 equivalent forms as a fraction, decimal, or percent.
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The position of an object along a vertical line is given by s(t) = −t3 + 3t2 + 7t + 4, where s is measured in feet and t is meas
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Answer:

The maximum velocity of the object in the time interval [0, 4] is 10 ft/s.

Step-by-step explanation:

Given : The position of an object along a vertical line is given by s(t) = -t^3+3t^2+7t +4, where s is measured in feet and t is measured in seconds.

To find : What is the maximum velocity of the object in the time interval [0, 4]?

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Distance in terms of t is given by,

s(t) = -t^3+3t^2+7t +4

Derivate w.r.t. time,

v(t)=s'(t) = -3t^2+6t+7

It is a quadratic function so its maximum is at vertex of the function.

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v(t)= -3+6+7

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Th maximum velocity is 10 ft/s.

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