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gogolik [260]
3 years ago
13

Emma sells jewelry online. She has found that when she sells each piece of jewelry for $20, she sells an average of 23 pieces of

jewelry every month. Emma has also found out that when she increases the price of jewelry by $5, the number of pieces sold per month decreases by an average of 7.
Emma's profit per month is given by the polynomial below, where x is the number of $5 increases in jewelry price over $20.

P(x) = $460 - $25x - $35x2
Mathematics
1 answer:
djverab [1.8K]3 years ago
4 0
Faded f f f devastated
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When 2/3 is added to a certain number, the sum is 3 greater than twice the number. part 1: set up an equation using n to represe
Gennadij [26K]
2/3 + n = 2n + 3 <== ur equation
2/3 - 3 = 2n - n
2/3 - 9/3 = n
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or
2/3 + n = 2n + 3...multiply everything by common denominator of 3
2 + 3n = 6n + 9
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What is the area a a circle when the circumference is 3.50
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The area of the circle would be 0.97
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Luis found two bicycles he likes. The price of the first bicycle is 73.59. The price of the second bicycle is 98.50. Estimate th
geniusboy [140]
$24.91
Subtract the two bicycle prices
4 0
2 years ago
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Which relationships have the same constant of proportionality between yyy and xxx as the equation 3y=27x3y=27x3, y, equals, 27,
Tanya [424]

Answer:

A, B and C

Step-by-step explanation:

In the equation: 3y=27x

Making y the subject of the equation, we have:

y=\frac{27}{3}x\\y=9x

The constant of proportionality between y and x  is 9.

We want to determine which relationships have the same constant of proportionality 9.

<u>Option A</u>

y=9x

The constant of proportionality is 9.

<u>Option B</u>

2y=18x

Divide both sides by 2 to obtain: y=9x

The constant of proportionality is 9.

<u>Option C</u>

x=3, y=1/3

Substitution into y=kx gives:

1/3=3k

k=9

The constant of proportionality is 9.

<u>Option D</u>

x=6, y=2/3

Substitution into y=kx gives:

2/3=6k

k=2/3*6=4

The constant of proportionality is 4.

<u>Option E</u>

When x=2, y=18

Substitution into y=kx gives:

18=2k

k=9

However, when x=4, y=27

Substitution into y=kx gives:

27=4k

k=6.75

This is not a proportional relation since the constant of proportionality is not equal.

The correct options are A, B and C

4 0
3 years ago
On a 50-question test, a student answered 5 questions incorrectly. What percent did the student answer correctly? A. 45% B. 90%
nadya68 [22]
Hey there,

Pretend that 50 = 100

And that 5 = 10.

I did a 100 test unit test, and I got 10% wrong.

If you think about this, the answer would be 90%

So, it's the same in this case,

50 in half of 100

5 is half of 10.

So . . .

This would mean that your correct answer would be 90% because 5 in this case is to be considered to be 10.

Your correct answer is  . . . . 

\boxed{\boxed{90 \ would \ be \ your \ correct \ answer }}

Hope this helps
~Jurgen
7 0
2 years ago
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