rhettperkins
01.07.2019 •
Mathematics
The length of a rectangle is 9.7 cm more than 4 times the width. if the perimeter of the rectangle is 68.4 cm, what are its dimensions?
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Ответ:
P = 68.4
L = 4W + 9.7
68.4 = 2(4W + 9.7 + W)
68.4 = 2(5W + 9.7)
68.4 = 10W + 19.4
68.4 - 19.4 = 10W
49 = 10W
49/10 = W
4.9 = W < the width is 4.9 cm
L = 4W + 9.7
L = 4(4.9) + 9.7
L = 19.6 + 9.7
L = 29.3 <=== the length is 29.3 cm
Ответ:
A(1,-9), B(3,-5),C(4,-8)
Step-by-step explanation: