If 2-4=20 than x is equal to 12
Answer:
y = 5x
Step-by-step explanation:
since y varies directly as x then the equation connecting them is
y = kx ← k is the constant of variation
to find k use the condition y = 60 when x = 12, then
k =
=
= 5
y = 5x ← is the equation of variation
Y = $1.25x
is this what you mean?
For #2 just do Pythagorean theorem. That is 5²+h²=10²
25+h²=100
h²=75
h=sqrt(75)
Use a calculator to approximate the height
And I think it is irrational because square roots are not exact rational numbers