Evaluate dx.

-4x + 7y = 1
25 = 2x +5 y

dx = ?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

In which form is the following function written? y = - 2(x – 3)(x + 5)

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes