7x+12=X-6 Write an equation to find the value of x so that each pair of polygons
has the same perimeter. Then solve.
15.
16.
5x
5x
5x
x + 14
X + 17
X + 9
x+1
X + 6
5x
5x
x + 4
8x + 9
5x
x +3

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]