There are two quantities of salt solution: 80g and 120g. in the first solution there are 12g of salt, in the second solution there are 15g of salt. what is the concentration (in percent) of salt in each solution? what would be the concentration if we were to mix these solutions?

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

If you have the following equation, 2/3x+5/6-x=2-3/4x what would you multiply each term by to get rid of all the fractions