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29.06.2019 •
Mathematics
Lee drove 420 miles and used 15 gallons of gasoline.how many miles did lee's car travel per gallon of gasoline
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Ответ:
28
Step-by-step explanation:
420 divided by 15 is 28.
Ответ:
28 miles per gallon
Step-by-step explanation:
420/15=28
CHECK
28x15=420
hope this helps! have a great day ;)
Ответ:
Explanation:
-9x + 10y = -18
3x - y = 6
————————
-9x + 10y = -18
10(3x - y = 6)
————————
-9x + 10y = -18
30x - 10y = 60
————————-
21x = 42
x = 42/21
x = 2
Find y:
3x - y = 6
3(2) - y = 6
6 - y = 6
-y = 6 - 6
-y = 0
y = 0