Solve the following systems of equations by elimination. Verify the solution: A. r+2s+1=0 and r+5s+25=0
B. 4m-3n=27 and 8m-6n=18
C. 0.6x=1.2+0.3y and 2.2x-1.8y-1.6=0

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Which expression is equivalent to 3^3 + 2^2?

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?