Alondra is training for a 5 mile race. The table below shows how many strides Alondra takes as she builds up to running 5 miles.
How many strides will Alondra take to run 4 miles?
Exercise Log
Miles 1 2 4 5
Strides 2,640 5,280 ? 13,200
7,920
9,240
10,560
10,660

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Which of the following is an equation of a line parallel to the equation y=4x+1?