A rectangle has a length of 6 inches and a width of a inches. The value of the perimeter of the rectangle is equal to the value of the area of the rectangle. Graph a system of linear equations to find

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

Having a hard time understanding this question (see attachment).

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog