Marina K.

A plane can travel 960 miles in 2 hours with a tail wind. The return trip takes 2 hours and 40 minutes against the wind (use a mixed number or improper fraction to represent this time - NO... more

Given that a company's net sales in billion is given by S(t) where t is the number of years since 2000. What were the 1) net sales and 2) rate of change in sales in year... more

 Show that: (5xy+3y)2 -(5xy-3y)2=60xy2  

mary is 64 inches tall. this is 20 inches less than twice raul's height what is rault's height  

Hi, I need steps on how to solve this. It's 5 times I try to solve it : 2x/(x-3) = 10/(x+1) — (7x-27)/(x-3)

For which values of x is f(x) greater than g(x)? (Give your answer as an inequality.)     For which values of x is g(x) greater than f(x)? (Give your answer as an inequality.)

Find the missing coordinate x  write an equation of the line in point-slope form 

Please Help I've spent the last hour on this single problem trying to come up with the answer, and because I want to understand exactly how to find the answer please show all steps on how you found... more

Carter and his family are driving from Atlanta to Raleigh. They drive for 2 hours and 45 minutes at an average speed of 60 miles per hour. How far did Carter and his family travel in that time?

I don't know how to do this, please help!

factorise each of the following expressions completely     a) 6x^2y^2-5xy-4   b) 3z-8xyz+4x^2y^2z   c) 36y^2-49(x+1)^2  

i need steps to solve this problem  in details 

Multiply or divide as indicated. Be sure to reduce all answers to lowest terms.   a2+2a+1/a+1 X a-1/a2-1      

given u=(2,0,-3) v=(3,1,2) and w=(0,-2,1) (a) which pairs of the following vectors are orthogonal? (b) find the angle between a pair of these vectors which are not orthogonal (c) express (1,5,3)... more