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STatiana [176]
3 years ago
15

1. 5m +9n (if m= -7 and n= 4)

Mathematics
2 answers:
iren [92.7K]3 years ago
8 0

Answer:

1

Step-by-step explanation:

Evaluate 5 m + 9 n where m = -7 and n = 4:

5 m + 9 n = 9×4 - 7×5

5 (-7) = -35:

-35 + 9×4

9×4 = 36:

36 - 35

36 - 35 = 1:

Answer:  1

Lunna [17]3 years ago
3 0

Answer:

1

Step-by-step explanation:

Given

5m + 9n ← substitute m = - 7 and n = 4 into the expression

= (5 × - 7) + (9 × 4)

= - 35 + 36

= 1

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Answer:

Let's solve your equation step-by-step.

|−x−15|=|5x−23|

Solve Absolute Value.

|−x−15|=|5x−23|

We know either−x−15=5x−23or−x−15=−(5x−23)

−x−15=5x−23(Possibility 1)

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(Divide both sides by -6)

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−x−15=−(5x−23)(Possibility 2)

−x−15=−5x+23(Simplify both sides of the equation)

−x−15+5x=−5x+23+5x(Add 5x to both sides)

4x−15=23

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Check answers. (Plug them in to make sure they work.)

x=

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(Works in original equation)

x=

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(Works in original equation)

Answer:

x=

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or x=

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Step-by-step explanation:

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