What is Everyone up to??? Which of the purchases would be the least expensive?

Purchase
Amount of sale
Sales tax rate
A
$150
5%
B
$145
7%
C
$140
8%
D
$135
9%

purchase A
purchase B
purchase C
purchase D

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

Which of the binomials below is a factor of this exression? 16x^2+40xy+25y^2 a.4x-5y b. 2x-5y c.4x+5y d.2x+5y