There are 24 boys and 16 girls in a hall, each holding coins in their hand.
The mean number of coins for the children is 18
The mean number of coins for the boys is 12
Work out the mean number of coins for the girls.

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?

In the triangle below, what is the length of the side opposite the 60° angle?