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DaniilM [7]
3 years ago
7

Question 10 of 10

Mathematics
1 answer:
Aliun [14]3 years ago
7 0

Answer:

D. 28

Step-by-step explanation:

We are given the following polynomial function:

F(x) = x^2 - 2x - 7

Find F(-5).

This is the value of F for which x = -5. So

F(-5) = (-5)^2 - 2(-5) - 7 = 25 + 10 - 7 = 28

28, which means that the correct answer is given by option D.

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Sunny_sXe [5.5K]
   
<span>D = 22ft
h = 9 ft

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3 0
3 years ago
Read 2 more answers
Peter leaves Mitchell's house traveling 30 mph. Mitchell leaves 15 min later, trying to catch up to peter, going 40 mph. if they
UkoKoshka [18]

Answer:

  45 minutes

Step-by-step explanation:

At 30 mph for 1/4 hour, Peter has a 7.5 mile head start. After he leaves, Mitchell closes that gap at the rate of 40-30 = 10 miles per hour. It will take him ...

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<em>Alternate Solution</em>

Another way to look at it is that Mitchell's 10 mph advantage is 1/3 of Peter's speed, so it will take 1/(1/3) = 3 times the period of Peter's head start:

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You can write equations involving time and distance and see where the distances traveled become the same. You need to be careful choosing the time reference, since you're concerned with Mitchell's travel time. I personally prefer to work "head start" problems by considering the differences in time and speed, as above. This is where you end up using the equations approach, anyway.

4 0
3 years ago
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melisa1 [442]

Answer:

x = 1.71428571429 (1.7)

Step-by-step explanation:

4 - 7x= -8

-4         -4

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x = 1.71428571429

x = 1.7

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Answer:

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Step-by-step explanation:

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