Wich are perpendicular lines?

Sum of 42 and twice a number is 164. find the number

A sales rep needs some cardboard boxes to store samples at work. The office supplier has three different sized boxes.

Frank bought a new video game. the 5%sales tax was 0.75 what was the price of the game before tax

Add 5 and 14, triple the sum and then add 4/5

Solve the inequality for x. -2x + 2 < - 8

Find the side length of a cub with a volume 185cm cubed

You run at a rate of 4 mph and your friend runs at a rate of 3.5 mph Your friend starts running 10 minutes before you, and you both run for a half an hour on the same path. A. Find your speed and your friends speed in miles per minute B.

Problem Francois baked just enough cookies to fill all the orders at his bakery. While the cookies were cooling, a kitchen assistant knocked over a cooling rack and spilled 12%, percent of the cookies onto the floor.

Tickets to the zoo cost $4 for children, $5 for teenagers and $6 for adults. In the high season, 1200 people come to the zoo every day. On a certian day, the total revenue at the zoo was $5300. For every 3 teenagers, 8 children went to the zoo.

I don't really get it is kinda frustrating one problem is 4over7 and 3over5which one is greatest