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timurjin [86]
3 years ago
12

The equation yˆ=−5.131x2+31.821x−3.333 approximates the number of people standing in line to catch a commuter train x hours afte

r 5 a.m. What is the best estimate for the number of people in line at 8 a.m.?
a.32
b.40
c.46
d.77
Mathematics
2 answers:
Amanda [17]3 years ago
6 0
Y ( 2 ) = - 5.131 · 2² + 31.821 · 2 - 3.3333 = 
= - 5.131 · 4 + 63.642 - 3.3333 = -20.524 + 63.642 - 3.3333 = 39.78 ≈ 40
Answer: B ) 40.
tekilochka [14]3 years ago
6 0

Answer:

the answer is C 46

Step-by-step explanation:

I took the test, <3

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jek_recluse [69]

Answer:

PQ=30

Step-by-step explanation:

Knowing that the segment has 3 parts that are 3:1:1 and sum up to 50, you could find how much 1 would equal by finding the total in relation to the ratio (doing 3+1+1) which gets you 5 parts. Then you can divide the total (50) by 5 to figure out how much one part would equal (10). Now, since you know that 1 part is equal to 10 and that PQ is 3 parts, you can find that PQ is equal to 3x10, or 30.

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3 years ago
Let C represent the cost in dollars and R represent the revenue in dollars. What is the break-even point? Use a table to help if
krek1111 [17]

Answer:

(5,225)

Step-by-step explanation:

The break even point is when the cost equals the revenue.

C=R

15x+150=45x

150=30x

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Plug this back into the original equations to get the y value.

15*5+150=225

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5 0
2 years ago
Work out, giving your answer as a mixed number:
anyanavicka [17]

Answer:

1 11/20

Step-by-step explanation:

hope this helps! :)

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