How do i prove lines are parallel

A man bought some secondhand furniture for 2/3 of what it cost new. He paid $400 for it. How much did it cost new?

There are 20green disk and 100 purple disks in a bag what is the ratio of purple disks to green disk

7 (x - 3) = 4 (x + 5) Solve for x

Which function will have the largest output value when x=100

What is - 15+v over - 3=21

Mike has $22 in his bank account and deposits $11.50 each week. At the same time, Tim has $218 in his account but is withdrawing $13 each week. When will the accounts have the same balance? How much money will each of them have after 12 weeks?

In the morning ma'lia studied 40 minutes for a math test. Later that evening ma'lia studied for x more minutes. Write an equation that represents the total number of minutes, y, ma'lia studied for the math test.

A rectangular prism has a top face with an area of 20 ft2 and a height of 5 ft. What is the volume of this rectangular prism? This is a 5th grade Question

Based on a survey conducted by Greenfield Online, 25 - 34-year-olds spend the most each week on fast food. The average weekly amount of $44 was reported in a May 2009 USA Today Snapshot.

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