The width of a rectangle is fixed at 30 cm, and the perimeter can be no greater than 170 cm. Find the maximum length of the rectangle.

Student price tickets to a movie are $1 and non student tickets are $2 . 350 tickets are sold and the total amount made is $450. there were 250 student tickets sold . true or false .

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?