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sergij07 [2.7K]
2 years ago
13

If y is directly proportional to x^2 and y=18 and x=3,

Mathematics
1 answer:
Svetach [21]2 years ago
7 0

Answer:

Step-by-step explanation:

(i)

y=k*x^2\\\\if\ x=3, y=18 ==> 18=k*9\ ==> k=2\\\\Equation\ is:\ y=2x^2\\

(ii)

x=5 ==> y=2*5²=50

(iii)

32=2*x^2\\x^2=16\\x^2-4^2=0\\(x-4)(x+4)=0\\\\x=4\ or\ x=-4\\

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Answer:

nth day: w:x:(y-2(n-1))

Step-by-step explanation:

Let Original time = w:x:y

Where w is the hours, and x is the minutes, and y is the seconds.

Sadie's time on the first date: w:x:(y-2)

Second day: w:x:(y-4)

Third day: w:x:(y-6)

and so on

nth day: w:x:(y-2(n-1))

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3 years ago
H(t) = −t2 + t + 1 h(−1)
Gwar [14]

Based on the given parameters, the value of the function h(-1) is -1

<h3>How to evaluate the function?</h3>

The equation of the function is given as:

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The function is given as:

h(-1)

This means that t = -1

So, we substitute t = -1 in the equation h(t) =-t^2 + t + 1

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h(-1) = -1

Hence, the value of the function h(-1) is -1

Read more about functions at:

brainly.com/question/1415456

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<u>Complete question</u>

Consider the following function definition, and calculate the value of the function

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2 years ago
A store buys 8 sweaters for $72 and sells them for $288. How much profit does the store make per sweater?
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Step-by-step explanation:

4 0
3 years ago
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Crank

Answer:

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Step-by-step explanation:

To find this answer, I divided his sales by his amount earned.

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This shows the for every 22.22 dollars sold, he recieved one dollar in commission.

Hope this helped! Thanks for posting your question! If correct, please award brainliest!

8 0
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Divide:<br><br><br> 27÷77,868<br> Help
Contact [7]

Answer:

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Step-by-step explanation:

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8 0
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