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KatRina [158]
3 years ago
8

Solve for m. 2= m/2 - 7 whats the answer?

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
7 0
Linear equations are all solved the same way. Figure out the operations performed on the variable. Undo those in reverse order.

Here, the variable is
- divided by 2
- has -7 added.

In reverse order, we undo these operations by
- adding 7
- multiplying by 2.

Whatever we do to one side of an equation, we must also do to the other side. That is how the equal sign remains valid.

2 = m/2 -7
2 +7 = m/2 -7 +7 . . . . . add 7
9 = m/2 . . . . . . . . . . . . simplify
2*9 = 2*m/2 . . . . . . . . multiply by 2
18 = m . . . . . . . . . . . . . simplify. (You know that 2/2 = 1, and m*1 = m.)

The answer is m = 18.

_____
Check:
.. 2 = 18/2 -7
.. 2 = 9 -7 . . . . . . . true. The answer checks OK.
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7 0
3 years ago
Pythagoras Theorem
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Answer:

  B.  x = 2√11

Step-by-step explanation:

The square of the length of the diagonal is ...

  d² = 6² + 8² = 36 +64 = 100

Then the length of x is found from ...

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7 0
4 years ago
Find f(-2) for f(x) = 3 • 2x<br><br> A. -36<br> B. -12<br> C. 1/36<br> D. 3/4
sattari [20]
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Explanation:

Given, f(x) = 3 • 2x

So , f(-2)=> x= -2

f(-2)= 3 • 2(-2)

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7 0
3 years ago
A 32-ft pipe must be cut into three pieces. The longest piece will be twice as long as the shortest piece, and the medium-sized
True [87]

Answer:

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Step-by-step explanation:

Let's say that the shortest pipe is equal to x, and work from there.

The medium size piece is 4 feet longer than the shortest piece, so it is equal to 4+x

The longest piece is twice as long as the shortest piece, so it is equal to 2 * x.

The three pieces added up make up the 32 feet pipe, so we can write this as

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subtract 4 from both sides to isolate the x and its coefficient

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divide both sides by 4 to isolate the x

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8 0
3 years ago
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