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shusha [124]
3 years ago
10

The square of sophie's age is 16 less than joanna's age. it is also the case that joanna's age is 8 times that of sophie. how ol

d is joanna?
Mathematics
1 answer:
mote1985 [20]3 years ago
5 0
Let s be Sophie's age. Then joanna is s²+16. Joanna is also 8s, if  Sophie is s. So:
s²+16=8s
s²-8s+16=0
(s-4)²=0
s=4
Sophie is 4; Joanna is 32
☺☺☺☺
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