Ms. li spent $840 on a vacation. she spent 2/3 of the amount on a train ticket and a 1/2 of the remaining amount on food. how much did she spend on the ticket and food all together

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

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.