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Svetach [21]
3 years ago
12

Which expressions are differences of squares? Select each correct answer.

Mathematics
2 answers:
Temka [501]3 years ago
8 0

Answer:

First two are difference in squares.

  • 81=9^2
  • 225=15^2
Alex_Xolod [135]3 years ago
7 0

Answer:

The expression which denotes the differences of squares is

n² - 225

As here 225 is a square of 15.

Hope it will help :)❤

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You are selling candy and wrapping paper for the band's Christmas fundraiser. The candy sells for 8 dollars per box and the wrap
Ludmilka [50]

Answer:

The number of boxes of candy sold is 4

The number of rolls of wrapping paper sold is 10

Step-by-step explanation:

Let x = number of boxes of candy that was sold.

Let y = number of rolls of wrapping paper was sold.

The candy sells for 8 dollars per box and the wrapping paper sells for 6 dollars per roll. This means that x boxes of candy and y rolls of wrapping paper will be sold for

$(8x + 6y)

If you have sold 14 items, and collected 92 dollars, this means that

x + y = 14

8x + 6y = 92 - - - - - - -1

Substituting x = 14 - y into equation 1, it becomes

8(14-y) + 6y = 92

112 - 8y + 6y = 92

- 8y + 6y = 92 - 112

-2y = -20

y = 20/2 = 10

x = 14 - y

x = 14 - 10

x = 4

The number of boxes of candy sold is 4.

The number of rolls of wrapping paper sold is 10.

7 0
3 years ago
Write the sum of the circumferences of all three circles in factored form.
salantis [7]

Answer:

2π(x+y+z)

is the factorization

4 0
2 years ago
Find two consecutive odd integers whose sum is 196
WINSTONCH [101]

n, n + 2 - two consecutive odd integers

196 - the sum

The equation:

n + (n + 2) = 196

n + n + 2 = 196      |subtract 2 from both sides

2n = 194     |divide both sides by 2

n = 97

n + 2 = 97 + 2 = 99

Answer: 97, 99.

3 0
4 years ago
Tom buys a new phone service. It costs $20 to install, and then costs $15 a month. Write an equation to show the cost of the pho
RoseWind [281]

Answer:

Y=$15x+$20

Step-by-step explanation:

4 0
3 years ago
The equation for Constant of Proportionality is y = kx? If you solved for the letter k instead of y, would the correct equation.
telo118 [61]
I don’t think it would work it you solved for k instead of y. Because you’re solving for y when you do constant of proportionality. i’m not sure if i’m right or not but that’s what i think.
3 0
3 years ago
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