Answer:38
Step-by-step explanation:multiple
The numeric constant of variation is 100
Step-by-step explanation:
Direct proportion means that increase in one variable cause increase in other variable
Here,
It is given that
y varies directly as x
y∝x
when the proportionality symbol is removed a proportionality constant is introduced

Given that
y = 100 when x = 4
Putting the values

The numeric constant of variation is 100
Keywords: Proportion variation
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Answer:
B
Step-by-step explanation:
x² + 9x
to complete the square
add ( half the coefficient of the x- term )² to x² + 9x
= x² + 2(
)x + (
)²
= x² + 9x +
← the value of c
= (x +
)² ← a perfect square