Answer:
27
Step-by-step explanation:
im almost possitive that that is right
Answer:
Sharon would need to subtract
Step-by-step explanation:
<u>Difference</u> is a keyword to subtraction
More Subtraction keywords:
Subtract.
Minus.
Take away.
Less / Fewer than.
Difference.
Decrease.
How many are left/remain?
Change – in money questions.
Answer:
1,728
Step-by-step explanation:
Answer:
7 minutes
Step-by-step explanation:
When Jay and Kevin work together to clear the driveway of snow it takes an average of 14 minutes. If Jay or Kevin works alone to clear the driveway he can clean it in 21 minutes. In total if Jay works alone then he can clean the driveway by spending additional 7 minutes.
The two original functions are 4x+9y=7 and 4x-9y=9
To use the combination method, add all the values of the two equations together to cancel out one of the variables
4x+4x+9y-9y=7+9
8x=16
8x/8=16/8
x=2
4(2)+9y=7
8+9y=7
8-8+9y=7-8
9y=-1
y=-