The average for a high school math contest was 91.2. 21 girls participated in the contest with an average of 92. The boys average was 90.5. Find the number of boys who participated.

The average for a high school math contest was 91.2. 21 girls participated in the contest with an average of 92. The boys average was 90.5. Find the number of boys who participated.

I have a 2500 gallon container. I fill it with 4 vendor's used oil, but the oil had residue. First vendor brings 559g at 91% (9% residue). 2nd Vendor brings 147g @ 67%. 3rd brings 1025g @ 82%. 4th...

word problem I need to solve for homework. I need to know how to get the answer

options a.16years b.12years c.24years d.20years

options a.16years b.12years c.24years d.20years

At 3:00 pm they are 75 miles away; they checked again at 4:30pm and were 15 miles away. a) on average, how fast were they traveling? b) write an equation that gives...

suppose that to make the golf team you need to score no more than 78 on average over 5 games. if you scored 75, 88, 70, and 67 in your first 4 games what is the highest score you can shoot in your...

Vehicle A averages 14 miles per gallon of gasoline, and Vehicle B averages 36 miles per gallon of gasoline. At these rates, how many more gallons of gasoline does Vehicle A need than Vehicle B to...

If I have a 98 that is worth 20%, a 94 that is worth 30%, adn a 95 that is worth 10%, how do I figure my current average?

Determine the average atomic mass of chlorine.

Explain the difference between the average atomic mass given on the periodic table and the mass of an atom.

Explain how average atomic mass is calculated?

Mr Smith works for car factory for 3 days . For the first day ,he earns $120 and every following day he earns one and a half of his previous day.What is Mr Smith average wage per day?...

The whole question: The average of four students' scores on a test was 70. The sum of seven other students' scores on the same math test was 160. What was the average score for these eleven students...

help find average of all 50 numbers

Estimate the average speed with which the hair on your head grows. Give your answer in both m/s and μm/h. Briefly describe how you arrived at the estimate.

a baseball player got 204 hits in just 540 at bats. Averages are usually calculated out of a thousand. What was his batting average.

About 8 out of 10 students need to take a refresher math course. If there are 1000 students how many will probably need to take the refresher course

Bart has a pa of 1.5 so far for the year for 20 credits. What grade point does he need for his remaining 10 credits to get a 2.0 for the year and avoid summer school?

Kodos became upset and agitated when told that he could not transfer credits from another planet. He has taken 20 credits with a GPA of 3.2. He needs a 3.3 to remain in the program as a non-resident...