Asked by thomas

A picture 15 inch x 30 inch is surrounded by a mat 2 inch wide.The aea of the mat in swuare inches is

a. 60
b. 94
c. 124
d. 128
e. 196

I know the answer is e, but i don't know how to do it, anyone can tell me how to do it, thank you
Answered by Ms. Sue
19 * 34 = 646

15 * 30 = 450

646 - 450 = 196 square inches
Answered by thomas
I don't understant,why 15 inch x 30 inch is surrouded by a mat 2 inch wide. 15+2 x 30+2 = 17 x 32
Answered by thomas
why + 4 ?

15+4 x 30+4

19 X 34 ?
Answered by thomas
oh , because two side right
Answered by Ms. Sue
YES.
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