Two groups of hikers start at the same time and hike at the same average speed. Mark’s group hikes for 2.5 hours. Sally’s group hikes for 4.7 hours and covers another 7.7 miles. Write and solve an equation to find how fast the hikers are going.

He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.