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jolli1 [7]
3 years ago
9

Please help !! 7th grade math, if anyone has the answer key please tell me what it is

Mathematics
1 answer:
STALIN [3.7K]3 years ago
4 0

Answer: Taxes goes to add

Step-by-step explanation: I say this because at the end of any purchase you have to add the tax to it which would bring your end total higher and not lower

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Mrs. Wilbur can grade a set of 32 tests in 1 hour. How many tests can she<br> grade in 45 minutes?
galina1969 [7]

Answer:

24 tests

Step-by-step explanation:

Since 32 equals one hour and one hour is the total, we can see that 15 minutes equal 1/4, or 25%, 30 minutes equal 2/4, or 50%, and 45 minutes equal 3/4, or 75%. So, we can divide 32 by 4 to find out 1/4, or 25%, which equals 8. You can then multiply 8 by the number of fourths in 75% or 45 minutes, which is 3. 8 x 3 equals 24, so Mrs. Wilbur can grade 24 tests in 45 minutes.

7 0
3 years ago
The following is an equilateral triangle. Solve for y.
GuDViN [60]

Answer:

y = 68 degrees

Step-by-step explanation:

Here, we want to solve for an equilateral triangle with the internal angle measurement being y-8

If one of the angles is y-8, then the rest are y-8 too

mathematically, by adding all , we have a total of 180

Thus;

3(y-8) = 180

y-8 = 180/3

y-8 = 60

y = 60+8

y = 68 degrees

7 0
3 years ago
Hello i need some help please!​
Oksi-84 [34.3K]

Answer:

2x + 8

Step-by-step explanation:

8 more means too add and twice means multiplication so therefore it would be 2x plus 8 as the answer hope this helps.

3 0
3 years ago
Read 2 more answers
Solve 5x+4y=-30<br> 3x-9y=-18<br> Solve using the elimination method
jenyasd209 [6]

Answer:

  (x, y) = (-6, 0)

Step-by-step explanation:

The y-coefficients have opposite signs, so we can eliminate y-terms by multiplying both equations by a positive number and adding the results.

9 times the first equation plus 4 times the second gives ...

  9(5x +4y) +4(3x -9y) = 9(-30) +4(-18)

  45x +36y +12x -36y = -270 -72 . . . . eliminate parentheses

  57x = -342 . . . . . collect terms

  x = -6 . . . . . . . divide by the coefficient of x

__

Substituting into the first equation gives ...

  5(-6) +4y = -30

  4y = 0 . . . . . . . . . add 30

  y = 0

The solution is (x, y) = (-6, 0).

4 0
3 years ago
Convert the mixed number into a improper fraction 5 1/3
a_sh-v [17]

Answer:

16/3

Step-by-step explanation:

3 0
3 years ago
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