To solve these, I like to write it out in expanded form for each rectangle.
Starting from left to right:
(12*7)+(12*5)+(12*7)+(7*5)+(12*5)+(7*5)
It can also be written as:
2(12*7)+2(12*5)+2(7*5)
This equals 358cm^2
It is squared because it is a result of multiplying 2 dimensions: length*width.
Answer:
Hannah will pay $45.25 when the 15% is applied before the $10.
Hannah will pay $46.75 when the $10 is applied before the 15%.
Step-by-step explanation:
To get 15% off 65:
Convert 15% to a decimal
15%=0.15
Multiply by the amount
0.15×65=9.75
Subtract from the amount
65-9.75=55.25
To apply $10 discount:
Subtract 10 from amount
55.25-10=45.25
Therefore, Hannah will pay $45.25 when the %15 is applied before the $10.
To get $10 off of 65:
Subtract 10 from amount
65-10=55
To apply %15:
Convert 15% to a decimal
15%=0.15
Multiply by the amount
0.15×55=8.24
Subtract from the amount
55 - 8.24=46.75
Therefore, Hannah will pay $46.75 when the $10 is applied before the 15%.