The chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Noa hopes to pick the winning ticket during her math class's raffle. the student who picks the ticket with a true statement will win.

Roger is ordering flowers for his cousin's wedding. Each flower is $1.25 and the delivery charge is $15 dollars no matter how many he orders.

The cost of a ticket to an amusement park is $42 per person. for groups of up to 8 people, the cost per ticket decreases by $3 for each person in the geoup. Marco's ticket cost $30.

How many times does 6 go into 110

A set of silverware contains 30 pieces. This set contains only spoons, forks, and knives. The set contains the same number of spoons and forks, and twice as many spoons as knives. How many forks are there in the set?

If the sum of two numbers is 280, and their ratio is 7:3, then the smaller number is?

You bought four cans of chicken soup at the grocery store. You pair a total 3.16 four cans.

Find the quotient: - 8 : 2 =

Suppose on a certain test, fifty students earn a perfect score and fifty students earn a zero. determine the mean grade and standard deviation among the one hundred students. a. mean grade among the one hundred students is a0 b. standard deviation:

Is 3/4 a solution of 12x - 2 = 16x + 4?