If f(x) = 2x -3 what is the value of f(x) when x is -5?

-13    

Step-by-step explanation:

To find the value of f(x) when x is -5, substitute -5 for the x in the equation. Then, simplify:  

So, when x is -5, the value of f(x) will be -13.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

(23*2)-12=x     x=34

step-by-step explanation: