Lena tried to solve a system of linear equations algebraically and in the process found the equation 5=9. lena thought something was wrong so she graphed the equations and found that they were parallel lines. explain what lenas graph and equation could mean

What is the solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)

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?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c