Jamaal spent x minutes today practicing his guitar and y minutes today on homework. If the total time he spent on both is 45
minutes or more, which inequality best represents his practice time?
x + y < 45
x + y > 45
x + y s 45
x + y 2 45

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.

What makes a trapezoid an isosceles trapezoid?