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Alik [6]
3 years ago
11

Solve for y in the two equations below using substitution.

Mathematics
1 answer:
Solnce55 [7]3 years ago
3 0

Answer:

C. y = -6

Step-by-step explanation:

3x – 6y = 9

–3x + 3y = 9

-3y = 18

y = -6

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The cost of a sweatshirt is 175% the cost of a T-shirt. A T-shirt costs $13.
Molodets [167]

Answer:

$68.25

Step-by-step explanation:

1. First, to find the cost of one sweatshirt, we multiply 175 by 13, and then divide by 100.

  • 175 * 13 = 2275
  • 2275/100=22.75

2. Now, we know that one sweatshirt costs $22.75. To find the cost of three sweatshirts, we multiply 22.75 by 3.

  • 22.75 * 3
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Therefore, the cost of 3 sweatshirts is $68.25.

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2 years ago
Find the derivative of f(x) = e^x^2
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4 years ago
Describe how to mentally calculate 1/10 of $12.50
ivanzaharov [21]
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4 years ago
The sum of three numbers is 185
Fiesta28 [93]
<h3><u>The value of the first number, x, is equal to 18.</u></h3><h3><u>The value of the second number, y, is equal to 90.</u></h3><h3><u>The value of the third number, z, is equal to 77.</u></h3>

x + y + z = 185

y = 5x

z = y - 13

Because we already have a value for y, we already have a value for z. We can now solve for a value of x.

x + 5x + 5x - 13 = 185

Add 13 to both sides.

x + 5x + 5x = 198

Combine like terms.

11x = 198

Divide both sides by 11.

x = 18

Because we have a value of x, we can solve for the exact values of y and z.

y = 5(18)

y = 90


z = (90) - 13

z = 77

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3 years ago
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kicyunya [14]

Step-by-step explanation:

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