Expressions in One Variable Pre-Test
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Alexis bought x boxes of cereal for $3 each, including tax, and paid with a $20 bill. Which expression represents the
total amount of change she should receive?
20 - 3x
O (3-20)
3x - 20
(20 - 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?

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

A. use the formula for continuous compounding with the original example: $1000 invested at 2% for 1 year. record the amount to 5 decimal places. use a calculator. b. compare it to the result using the original compound interest formula with n = 365 calculated to 5 decimal places. which has a larger value? explain.