Can anyone help me with these math questions? The chart goes along with the questions.

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

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