1. The measures of two angels have a sum of 90 degrees. The measures of the angels are in a ratio 2:1 determine the measures of both angels. Let x degrees represent the measure of one of the unknown angels

2. The measure of two angles have a sum of 180 degrees. The measures of the angels are in a ratio 5:1. Determine the measures of both angels. Let “X” represent the measure of one of the unknown angels.

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?