Pru makes a croissant mixture using butter and flour in the ratio 4:5. Workout how much butter she needs to mix with 200g of flour.

What are the solutions to the equation 4x2+3x=24-x

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%