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goldfiish [28.3K]
3 years ago
8

Find AE. Round the answer to the nearest tenth.

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0

Step-by-step explanation:

the answers to the nearest tenth is 9.7

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What is the solution to the system of equation 2x-y=7<br> Y=2x+3
Veronika [31]
<span><span>4x - y = -4</span>
<span><span>-y = -4 - 4x (subtract 4x from each side)
y = 4 + 4x (divide by -1)
y = 4x + 4 (commutative property of addition to get the x-value in front). 

Now we must plug what we have gotten y to equal into the other equation. If we try to plug what we have rearranged back into the original equation, we don't get anywhere. 

2x - y = -7
2x - 1(4x + 4) = -7 (substitution)
2x - 4x - 4 = -7 (distributive property with -1)
-2x - 4 = -7 (combine like terms)
-2x = -3 (add 4 to each side)
x = 3/2 (divide by -2). 

You</span></span><span>2x-y=7
Y=2x+3</span><span> have just solved for x! We can now plug what we have found for x into either equation to get what y equals. (If this is truly a system of linear equations, then it will not matter which one we use.) 

2(3/2) - y = -7 (substitution)

6/2 - y = -7 (multiplication)
3 - y = -7 (division)
- y = -10 (subtraction)
y = 10 (division) 

You have just found y! As a point, the solution to this system is (3/2, 10) with the x-coordinate first and the y-coordinate second. If we plug x and y into both equations, we will find that they will make the equations true. This is how we check ourselves. Using both equations: 

4x - y = -4
4(3/2) - 10 = -4 (does the left half equal -4?)
12/2 - 10 = -4
6 - 10 = -4
-4 = -4 (it does); 

2x - y = -7
2(3/2) - 10 = -7
3 - 10 = -7
-7 = -7. </span></span>
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Answer:

D

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If the original price is x and you deduct 3, you'l have x - 3.

If you buy 4 of them, you multiply that price by 4, giving you 4(x - 3).

Then, if that value is equal to 27, you get 4(x - 3) = 27

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First, we need to find his unit rate, the amount he earns in 1 hour.

So, we have to divide 28.50 by 2.

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To find the amount he earns in 8 hours, we will need to multiply hourly rate found by "8". So,

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<h2>Rolando earns $114 in 8 hours</h2>

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