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kotykmax [81]
1 year ago
9

Will mark brainliest. Question’s below! Please! Thank you!

Mathematics
1 answer:
Law Incorporation [45]1 year ago
3 0

Answer:

x = -2, y = -3

Step-by-step explanation:

Solve for y:

If -3x + 9y = -21, and -3x +8y = -18, then -21 - y = -18

Add 18 to both sides:

-3 - y = 0, so y = -3

reconstruct new equation:

-3x + 9(-3) = -21, -3x + 8(-3) = -18

-3x + -27 = -21, -3x + -24 = -18

Using the new equation, solve for x:

add 24 to both sides of each equation :

-3x + -3 = 3, -3x = 6

x=<u>-2</u>

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Jaquez earns money by doing yard work. It takes her an average of 3 hours to pull weeds and an average of 2.5 hours to mow the l
vodomira [7]

Answer:

Step-by-step explanation:

Let x = number of hours to pull weed in a day

Let y = number of hours to now lawn in a day

It takes her an average of 3 hours to pull weeds and an average of 2.5 hours to mow the lawn. She can work no more than 8 hours a day.

This means

3x + 2.5y is lesser than/ equal to 8

She charges $50 to weed and $65 to mow the lawn.

This means she charges

50x +65y

She needs to cover her expenses of $120 to make a profit. This means she needs to earn an amount greater than or equal to $120

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4 0
3 years ago
What is the solution to the equation 8 - 2b = -2/3(12b + 6)?
Delvig [45]
<span>8 - 2b = -2/3(12b + 6)
8 - 2b = -8b -4
8 + 4 = -8b + 2b
12 = -6b
b = -12/6
b = -2

So, your final answer is b = -2</span>
8 0
3 years ago
Whats the volume of a cube that is 1 inch by 1 inch
Maurinko [17]

Answer:

3

Step-by-step explanation:

5 0
3 years ago
The graph of which of the following equations (0,-3)
Bad White [126]
A Because y=mx+b So if you graphed it then it would be A
7 0
3 years ago
A circular plate has a radius of 12 inches. What is its area? What is the value of supermeter?
juin [17]

Step-by-step explanation:

A

=

π

r

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=

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≈

452.38934

in²

4 0
2 years ago
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