A circle is shown. A secant goes through the center point and intersects a tangent at a point outside of the circle. The length of the tangent is 7 inches. The length of the external part of the secant is 4 inches.
Kylie writes an equation to solve for the diameter, d, of the circle shown. Solve Kylie’s equation to find the diameter of the circle.

4 (d + 4) = 72

What is the diameter?

7.5 in.
8.25 in.
11.25 in.
13.25 in.

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

3x = 729 solve for x plz . it's urgent. will mark

Type the correct answer in each box. use numerals instead of words. the average number of subscribers to an online magazine each year from 2010 to 2015 is given in the table below. the average number of subscribers to the online magazine in 2010 was the percent increase in the average number of subscribers in 2011 to the average number of subscribers in 2012 was %. the maximum average number of subscribers to the online magazine in the years shown was