Using x as the unknown number, write the statement below as an equation. the sum of twice a number and 9 is equal to the sum of the number and 1.

Simone claims the initial value and y-intercept are the same thing on a graph. is she correct? if you know that a line has a slope of and a y-intercept of 7, what is the equation for that line in slope-intercept form?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

You need to solve a system of equations. you decide to use the elimination method. which of these is not allowed? 3x - 2y = 7 3x + 4y = 17 equation 1 equation 2