You were so close! The correct answer is -33. You did all of your steps right in the beginning, but -30 - 3 is not 28, it's -33. If you have to add or subtract and you have 2 negative signs, then you keep that sign and add the numbers together. I remember this by singing a song to myself to the tune of Row Row Row Your Boat to help me. My 7th grade math teacher came up with it for our class.
Answer:
252 minutes
Step-by-step explanation:
All lawns are the same size, so it doesn't matter the exact size of the each lawn. Ignore the 0.2 acre size.
He started the first house at 9:00 AM and the sixth house at 10:00 AM.
Read the sentence above carefully. He started the first lawn at 9:00 AM. Since he started the sixth lawn at 10:00 AM, that means he finished the fifth lawn at 10:00 AM. In 1 hour, from 9:00 AM to 10:00 AM, he did 5 lawns.
1 hour = 60 minutes
60 minutes per 5 lawns = 60/5 minutes/lawn
which can be reduced to
12 minutes per lawn
His unit rate is 12 minutes/lawn.
Now you multiply his unit rate by the number of lawns, 21 of them, to find the number of minutes to spray 21 lawns.
12 minutes/lawn * 21 lawns = 252 minutes
Answer: 252 minutes
Answer:
17 < h = 42
Step-by-step explanation:
Hoped this helped! :)
we cannot have a negative number for x (its against the laws of math), so the domain would be all non-negative numbers
Step-by-step explanation:
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