Ajar contains n nickels and d dimes there are 20 coins in the jar, and the total value of the coin s is one dollar and forty cents. how many nickels and how many dimes are in the jar?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

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%

Write the expression 7x^3-28xy^2 as the product of 3 factors