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vodka [1.7K]
3 years ago
10

I’m having trouble on 10-11, if you can find the answer. Thank you!

Mathematics
1 answer:
PolarNik [594]3 years ago
3 0

Answer:

10-11 is -1

Step-by-step explanation:

i don'T care much for attachments ;)

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Simplify (-8z+4) + (7z-7)
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Answer:

1. -1z-3

2. 4x+2

3. -y+11

4. 7a-22

Step-by-step explanation:

Not too sure about the last one

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3 years ago
Lester worked 12 hours last week at the grocery store and earned $93.00. If he continues to earn the same hourly pay, how many a
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93 / 12 = 7.75

so Lester earns $7.75 a hour.

if he earns $62 how many hours did he work.

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62/ 7.75 = 8

so he worked 8 hours.
4 0
3 years ago
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Alexa pays 7/20 of a dollar for each minute she uses her pay-as-you-go phone for a call, and 2/5 of a dollar for each minute of
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Answer:

  • The system of equations is x + y = 85 and 7/20x+2/5y=31
  • To eliminate the x-variable from the equations, you can multiply the equation with the fractions by 20 and multiply the other equation by -7.
  • B-She used 60 minutes for calling and 25 minutes for data.

Step-by-step explanation:

It is always a good idea to start by defining variables in such a problem. Here, we can let x represent the number of calling minutes, and y represent the number of data minutes. The the total number of minutes used is ...

  x + y = 85

The total of charges is the sum of the products of charge per minute and minutes used:

  7/20x + 2/5y = 31.00

We can eliminate the x-variable in these equations by multiplying the first by -7 and the second by 20, then adding the result.

  -7(x +y) +20(7/20x +2/5y) = -7(85) +20(31)

  -7x -7y +7x +8y = -595 +620 . . . . eliminate parentheses

  y = 25 . . . . . . . . simplify

Then the value of x is

  x = 85 -y = 85 -25

  x = 60

7 0
3 years ago
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The tree is tilted 14 degrees. Find the value of x
Mashutka [201]
I think it's 76 degrees
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3 years ago
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A family purchased tickets for a concert. They paid a total of $90 for 7 adult tickets and 12 child tickets. The price of a chil
andre [41]
A is aldult tickets
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b = 2/3 a

7a + 12b = 90
7a + 12 x 2/3 a = 90
7a + 8a = 90
15a = 90
a = 6; b = 4
4 0
3 years ago
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