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Olin [163]
2 years ago
5

Can anyone help me with this please

Mathematics
1 answer:
deff fn [24]2 years ago
4 0

Answer:

RPM 1388.889

Horsepower 366.802

Step-by-step explanation:

We do not need to solve the equation for y = 0, which is nice. We can go directly to finding the maximum.

The maximum or minimum of ax^2+bx+c is always at x=-b/2a

with b = 25/45 and a = -1/5000 we get

x = -25/45 / (-2/5000) = 5/9 * 2500 = 12500/9 ≈ 1388.889

Now we only need to put that x into the equation (ideally in form of 12500/9 for accuracy) and we get the horsepower of ~366.802

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Answer:

y = -2x + 3

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m = -2

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b = 3

y = -2x + 3

5 0
3 years ago
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Bill has saved $825 from his last 8 paychecks. He saved either $75 or $150 a paycheck. Formulate and solve a system of equations
11Alexandr11 [23.1K]

Answer: 5 times

Step-by-step explanation:

Let the number of times that he saved $75 be x.

Let the number of times that he saved $150 be y.

Therefore, based on the information given in the question, we can form an equation which will be:

x + y = 8 ...... i

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From equation I,

x + y = 8

y = 8 - x....... iiii

Put equation iii into ii and this will be:

75x + 150y = 825

75x + 150(8 - x) = 825

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75x - 150x = 825 - 1200

-75x = -375

x = 375/75

x = 5

He saved $75 5times from his paycheck.

4 0
3 years ago
Which of the following is the same as 3/5÷4/7 <br> 3/5÷7/4<br> 4/7÷3/5<br> 3/5×4/7<br> 3/5×7/4
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Answer:

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Step-by-step explanation:

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Based on past musical productions, a theater predicts selling 400−8p number of tickets when each ticket is sold at p dollars. Us
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<h3>What is an Equation</h3>

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Revenue = number of tickets sold * price per ticket = (400 - 8p)p

Revenue = 400p - 8p²

For no revenue:

400p - 64p² =  0

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For revenue of atleast 3200:

400p - 8p² =  3200

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To earn at least $3,200 in revenue, the ticket prices should be $10 or $40.

Find out more on Equation at: brainly.com/question/1214333

7 0
2 years ago
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