Which expression is equivalent to 3(m − 3) + 4? 3m + 1 3m − 5 3m + 13 3m − 3
2 answers:
So let's simplify this problem using the distributive property.
The first thing we want to do is change the minus to plus a negative. Now we can distribute or multiply this 3 times each of the terms inside the set of parentheses.
So we get 3 (m) + 3 (-3) + 4 and this simplifies to 3m + -5.
3m + -5 means the same exact thing as 3m - 5.
Work is also attached in the image below.
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We start at -3. So we can start our equation with that:
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stands for the number of hours. Each hour accounts for a change of -2.5 in degrees, meaning that we must multiply our
by -2.5. We can now add this term into our equation:
We are trying to find when we will reach -18 degrees, so we will set our entire equation equal to -18 and solve:
It will take us 6 hours, or choice A.