you can a number to the nearest tens and hundreds to find a number that tells about how much or about how many

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

Answer this question! 30 points and brainliest! only if you know the answer.

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?