R+ 4f when r=-6 and f=-5

-26.

Step-by-step explanation:

Substitute the numbers and letters like this

-6 + (-5 x 4)

Which would evaluate to -6 + -20

And since it's the same sign, you can make it -6 - 20.

That equals -26.

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