找到你今天要练的题。

The function \( f\left(x\right)=-40x+340 \) gives the predicted height above the ground \( f\left(x\right) \), in feet, of a model airplane x minutes after it begins to descend. What is the predicted height above the ground, in feet, of the model airplane 3 minutes after it begins to descend?

The function \( f \) is defined by \( f\left(x\right)=2x^3+\frac{1}{3}x^2-x \). What is the value of \( f(1) \)?

Function \( f \) is defined as  \( f\left(x\right)=\left(2x-5\right)^2 \), and function g is defined as \( g\left(x\right)=2\left(2x+7\right) \). Which of the following is equivalent to \( f\left(x\right)+g\left(x\right) \) ?

\( f(x)=2x+3 \) 
\( g(x)=7x-2 \) 
\( h(x)=5x+6 \) 
The functions \( f \), g , and h are defined as shown. If \( f(x)·g(x)−h(x)=ax^{2}+bx+c \) , where a, b , and c  are constants, what is the value of b?

The function \( f \) is defined by \( f(x)=\frac{x+11}{5} \), and \( f(a)=-18 \), where a is a constant. What is the value of a?

The function g is defined by \( g(x)=4x+2 \). What is the value of \( g(x) \) when \( x=2 \)?

The function \( f \) is defined by the equation \( f(x)=5x-6 \). What is the value of \( f(x) \) when \( x=10 \)?

The function \( f \) is defined by \( f(x)=-3x+40 \). What is the value of \( f(x) \) when \( x=-7 \)?

The function \( f \) is defined by \( f(x)=6(x-2)(x^2-k) \), where k is a constant. In the xy-plane, the graph of \( y=f(x) \) passes through the point \( (-1,\ 80) \). What is the value of \( f(0) \)?

The function \( f(w)=6w^2 \)  gives the area of a rectangle, in square feet \( \left(ft^2\right) \) , if its width is w ft and its length is 6 times its width. Which of the following is the best interpretation of \( f(13)=1,014 \) ?

The function \( f \) is defined by the equation \( f(x)=380x \). What is the value of \( f(10) \) ?

The function \( f \)  is defined by \( f(x)=x^2+79 \). What is the value of \( f(x) \) when \( x=10 \) ?