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iren2701 [21]
3 years ago
8

4m + 9 + 5m - 12 = 42

Mathematics
2 answers:
MrRissso [65]3 years ago
4 0
4m+9+5m-12=42 is 5. m= 5.
Fiesta28 [93]3 years ago
3 0
First, combine like terms.

4m+5m = 9m

9m + 9 - 12 = 42

9-12= -3

9m - 3 = 42

Second, apply the inverse operation to isolate the variable.

9m - 3 = 42
      +3     +3

9m = 45

Third, divide 9 by both sides to solve for m.

\frac{9m}{9} =  \frac{45}{9}

m = 45/9

m = 5

Answer:  m = 5
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3 years ago
1/5x-2/3y=30 when y=15
dolphi86 [110]

Answer:

Step-by-step explanation:

<u>Step 1:  Set y to 15 and solve</u>

<u />\frac{1}{5}x - \frac{2}{3}*15=30

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<em>Add 10 to both sides</em>

<em />\frac{1}{5}x-10+10=30+10

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3 years ago
What is 0.8637 rounded to the nearest hundredth​
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<h3>Answer:</h3>

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<h3>Step-by-step explanation:</h3>

The hundredths place is the second digit after the decimal point.  It is the 6 in this case.

Since the next digit (3) is 4 or less, the hundredths place stays the same and the rest is basically just cut off, leaving 0.86.

If the next digit (3) were 5 or more, the hundredths place would have gone up 1 (to 7) and the rest would have been cut off, giving a final result of 0.87

4 0
3 years ago
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