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viktelen [127]
3 years ago
14

Solve the system using addion 7x+2y=-13 -7x+y=25

Mathematics
1 answer:
larisa [96]3 years ago
5 0

Answer:

x = -3

y = 4

Step-by-step explanation:

7x + 2y = -13

-7x + y = 25

3y = 12

-7x + y = 25

y = 4

-7x + 4 = 25

y = 4

-7x = 21

y = 4

x = -3

there is only 1 solution for this equation is (-3,4)

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Answer:

The weighted average is of 69.94.

Step-by-step explanation:

Weighted average:

The weighed average is found multiplying each grade by its respective weight.

The grades, and weights are:

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69 on the first major test, with a weight is 21.5% = 0.215

85 on the second major test, with a weight is 21.5% = 0.215.

63 on the final exam, with a weight of 34% = 0.34.

Weighted average:

A = 0.23*67 + 0.215*69 + 0.215*85 + 0.34*63 = 69.94

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3 years ago
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Answer:

Step-by-step explanation:

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2 years ago
The graphs below have the same shape. What is the equation of the blue graph?
Anna11 [10]

Answer:

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Step-by-step explanation:

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3 years ago
-x/6 + 6 = 32<br> What is the answer and how do I solve it
masha68 [24]

Answer:

x= -120

Step-by-step explanation:

-x/6+6+6=32

  1. Use -a/b=a/-b= -a/-b to rewrite the fraction.
  2. -x/-6+6+6=32
  3. Add the two 6's then you get 12
  4. -x/-6+12=32
  5. Multiply both sides with the equation by 6
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  7. Move the constant to the right-hand side and change its side
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  9. Subtract the numbers, -x=192-72
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2 years ago
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Anvisha [2.4K]

Answer:

Step-by-step explanation:

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3 years ago
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