Answer:
Addition.
Step-by-step explanation:
Multiplication is a faster way to do repeated addition.
For example, lets say you would add 10 fifteen's together. Addition would make it:
15 + 15 + 15 + 15 + 15 + 15 + 15 + 15 + 15 + 15
= 30 + 30 + 30 + 30 + 30
= 60 + 60 + 30
= 120 + 30
= 150
However, when multiplying:
15 x 10 = 150
As you can tell, multiplication makes it so there are less steps, and is less time consuming.
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Answer:
32 Nickels
Step-by-step explanation:
Given
Coins: Nickels (N) and Dimes (D)
$0.05 = 1 nickel and $0.10 = 1 dime
So, the amount implies:
The number of coin implies:
Required
Determine the number of nickels found
Substitute 14 + N for D in
Collect Like Terms
Solve for N
Hence, he found 32 nickels
Answer:
length is 13 units
Step-by-step explanation:
case 1
l×b= 7+2(l+b)
lb = 7+2l+2b
given , b= 3
so,
l×3 = 7+ 2× l + 2× 3
3l -2l = 13
l = 13
A square. Try using a coordinates grid to work this out.