If used compensation to find product of 37x4 first she found 40x4=160 then adjusted that product by adding 3 groups of 4 to get her final answer 172. what did she do incorrectly?

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

1. what is the measure of ∠abc? what is the measure of ∠abd?

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?