Simplify: 1.) 1/5b-5(2/5a-1/10b)+4a

2.) 2.3c-5.25(2.6d-2.8)-7.9

3.) 4(4y-7y2)-9(5y+2)

4.) 2/3a+6-3/5a-1

5.) 5/4x-8y-1/4x+7y+3

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

What is the area of a pizza with a radius of 40 cm leave the answer in terms of π to find your exact answer 40π cm² 1600π cm² 800π cm² 80π cm² π=pi