19 * 34 = 646
15 * 30 = 450
646 - 450 = 196 square inches
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
5 answers
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
why + 4 ?
15+4 x 30+4
19 X 34 ?
15+4 x 30+4
19 X 34 ?
oh , because two side right
YES.
9 answers