Solve the proportion 84/12 = 28/X

Use substitution to solve each system of equations y=x-1 x+y=3

John worked 35 hours a week at buy-the-best for $8.50 per hour. so far, he has earned $3,272.50. how many weeks has john worked at buy-the-best?

There are 27 campers this is nine times as many as the number of counselors. how many counselors are there

Solve this system of equations using substitution. a + b + c = 180 b = 3a c = 5a

How many 25cm tins can fit in 600mmx500mm

The square root of 32 you the nearest hundredth

A biology class takes a field trip to a nearby ... field, and collects data on the biodiversity (the number of different plant and animal species) in their local ecosystem, Each student randomly selects one square meter of ground, and counts all the

Desk cost $349.50 once delivered invoice reflects $387.22. If tax is 7.5% how much was the shipping charge?

If I get £20 a month and don't spend it, how much money will I have by October 2019

A painter painted about half o room in half a day. Coley estimated the painter would paint 7 rooms in 7 days. Is coley's estimate reasonable