I can help you :) First, you need to find the common <span>denominator in equation.
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Answer:
f(3) = 70
Step-by-step explanation:
f(x)= 20x+ 10
Let x= 3
f(3)= 20*3+ 10
f(3) = 60+10
=70
Answer:
y = 7x
Step-by-step explanation:
Given that y varies directly as x the the equation relating them is
y = kx ← k is the constant of variation
To find k use the points given
k =
=
=
= 7
y = 7x ← equation representing the function