Answer:
The answer is supposed to be -9, not 9.
Step-by-step explanation:
In step 2, when you are adding a negative plus a negative (-4 + -5) it should always come out a negative. So, step 3 should come out as -9 instead of 9.
He's driving 42mph. 42m/60h=0.7mpm. 12 minutes x 0.7 mile per minute= 8.4 miles. 21-8.4=12.6 miles left . 12.6 x 0.7= 8.86 minutes left or about nine
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Answer:
20 x 30 + 11 - 8
Step-by-step explanation:
the shorter piece is 8 feet long
the longer piece is 19 feet long
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