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Varvara68 [4.7K]
3 years ago
5

Hey guys help my please !!Q 4,6,7

Mathematics
1 answer:
padilas [110]3 years ago
6 0
Q4, 4y²=60
y=√15 ( i am not sure)
q6, (5+y) ²=81
5+y=9
y=4
q7 (x+4) (x) =77
x²+4x-77=0
(x+11) (x-7) =0
x=-11(rej) or x=7
therefore ,length= 7+4=11cm
breadth=7cm
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