After Ricardo received his allowance for the week, he went to the mall with some friends. He spend half of his allowance on a new paperback. Then he bought himself a snack for $1.21. When he arrived home, he had $500 left. How much was his allowance?

When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the plzzz write a proportion i will give you 100 points

Percent increase and decrease. original number: 45 new number: 18