Answer:
d
Step-by-step explanation:
Given y is directly proportional to x² then the equation relating them is
y = kx² ← k is the constant of proportion
To find k use the condition y = 
when x = 
, then
= k( )² = 
k ( multiply both sides by 8 )
1 = 2k ( divide both sides by 2 )
k =
y = x² ← equation of proportion
When y = 
, then
= x² ( multiply both sides by 2 )
9 = x² ( take the square root of both sides )
x = ± 
= ± 3
with positive value x = 3 → d
5/2w=45/36 w=1 over 2 or 1/2
-11 y 17 with z and x on the line
Answer:
x
=
±
√
21
Explanation:
To find
x
2
you have to find the square root of
21 x = ± √ 21 ≈ ± 4.5286
Step-by-step explanation:
Answer:
She tips the waiter 25.5 dollar.
Step-by-step explanation:
If the dinner cost 85 you multiply by .30 and you get 25.5. If you wanna find out whole cost after subtract 25.5 from 85.
