9y+9x=27
x+y=3
<em><u /></em><u>Answer:</u> <em>x</em>+<em>y</em>=3
One month = 5000
Number of months before the spark plugs need to change :
15000 ÷ 5000 = 3
The sparks can last 3 months before it needs to be changed.
Number of times it need to change in a year = 12 ÷ 3 = 4
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Answer : It needs to be change 4 times a year.
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Answer:
10 times 8= 80 then 80 times 6 =480
Step-by-step explanation:
I believe the answer is 375