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denis-greek [22]
3 years ago
15

Simplify and solve this equation: 4m+9+5m-12=42

Mathematics
2 answers:
s2008m [1.1K]3 years ago
5 0
You first must add together the same values
So
4m+5m=9m
+9+-12 =-3
So you have
9m-3=42
Then you put the -3 on the other side you you add 3 in to both sides so now you have
9m =45
And then divide 45 divided by 9 = 5
So the answer is m=5
zimovet [89]3 years ago
4 0
First you combine like variables
9m - 3 = 42
then add both sides
9m = 45
then divide whats left
m = 5 
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Answer:

2(d-2)/(2d+1) or 1 - 5/(2d+1)

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Step-by-step explanation:

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Antonio finished the race in 28 minutes and 11.00 seconds. Julio finished 0.08 second faster than Antonio. Pete finished 0.1 sec
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Answer:

It took Peter 28 minutes and 10.82 seconds to finish the race.

Step-by-step explanation:

We have that:

t_{A}: Antonio = 28 min + 11.00 s (1)

t_{J}: Julio = A - 0.08 s  (2)

t_{P}: Pete = J - 0.1 s   (3)

Then, the time at which Pete finished the race is:

t_{P} = t_{J} - 0.1   (4)

By entering equations (1), (2), (3) into (4) we have:

t_{P} = (t_{A} - 0.08) - 0.1            

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I hope it helps you!

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