25x^2 -49=0
what is x

What is the approximate circumference of the circle shown below?

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?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?