Natalie budgets $146 for yoga training. she buys a yoga mat for $10 and spends at least $9 per day on yoga classes. which inequality represents the number of days, d, on which natalie can take classes?

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.

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?