Answer:
8.83
Step-by-step explanation:
to find k
y= kx2 (x squared)
substitution:
27= k 3·2 ( 3 squared)
27= k9
to remove 9, divide 9 to both sides
27/9 and k9/
3=k or k=3
————————————————————
find the X when y is 81
y=kx2
81= 3 x2
transpose:
81-3= x2
so,
81-3 =x2
78= x2
to remove the square,
√78 = √x2
= 8.83
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Answers & Comments
Answer:
8.83
Step-by-step explanation:
to find k
y= kx2 (x squared)
substitution:
27= k 3·2 ( 3 squared)
27= k9
to remove 9, divide 9 to both sides
27/9 and k9/
3=k or k=3
————————————————————
find the X when y is 81
y=kx2
substitution:
81= 3 x2
transpose:
81-3= x2
so,
81-3 =x2
78= x2
to remove the square,
√78 = √x2
= 8.83