找到你今天要练的题。

The function \( f \)is defined by \( f\left(x\right)=25x+30 \). What is the value of \( f\left(x\right) \)when \( x=2 \)?

The function \( f \) is defined by \( f\left(x\right)=\frac{1}{2}\left(x+6\right) \) . What is the value of \( f\left(4\right) \)?

The function \( f \) is defined by \( f\left(x\right)=-3x+60 \). What is the value of \( f\left(x\right) \) when \( x=-8 \)?

The total cost \( f\left(x\right) \), in dollars, to lease a car for 36 months from a particular car dealership is given by \( f\left(x\right)=36x+1,000 \), where x is the monthly payment, in dollars. What is the total cost to lease a car when the monthly payment is $400?

The function g is defined by \( g\left(x\right)=\sqrt{8x+1} \) . What is the value of \( g\left(3\right) \)?

A student council group is selling school posters for a fundraiser. They use the function \( p\left(x\right)=5x-220 \) to determine their profit \( p\left(x\right) \), in dollars, for selling x school posters. In order to earn a profit of $900, how many school posters must they sell?

The function g is defined by \( g\left(x\right)=6x \). For what value of x is \( g\left(x\right)=54 \)?

For the function f, if f(3x) = x -6 for all values of x, what is the value of f (6)?

Let the function p be defined as \( p(x)=\frac{\left(x-c\right)^2+160}{2c} \)  , where c is a constant. If \( p(c) =10 \), what is the value of \( p(12) \)?

The function ƒ is defined byƒ(x)=6+\( \sqrt{x} \)  . What is the value of ƒ (36) ?

The function f is defined by the equation f(x)=100x +2. What is the value of f(x) when x =9?

The function h is defined by h(x)= x +200. What is the value of h(50)?