Find The Value of k if (-2)^k+1 x (-2)^3 = (-2)^7

If (-2)^k+1 x (-2)^3 = (-2)^7

then,

k+1+3= 7

k= 7-3-1

k= 7-4

k=3

$32,660

step-by-step explanation:

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