What is the value of 3 x squared plus space 4 y squared if x = 2, y = 1, and z = –3?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

The area of square garden is 300m squared. how long is the diagonal?