4(x+15)=640

what does x equal?

Matilda and kathryn went on different road trips over spring break.the equation below represents the number of miles matilda drove in x hours.y = 60xthe table below shows the number of miles kathryn drove in x hours.time(in hours)distance(in miles)114228342456who drove at a greater speed? a. matilda drove at a greater speed.b. matilda and kathryn drove at the same speed.c. kathryn drove at a greater speed.d.there is not enough information to determine their speeds

Is the square root of 4 plus the square root of 16 rational?

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?