What is the value of x in the equation 7x - 30 = 180

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

Which of the following is the result of expanding the series

Find the value of the variable and the length of each chord for #5 and #6.