Y=2x 7x-2y=15i'm not so sure on how to solve this question , me i have a maths test tmr : ( you so much

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?

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min