dianna is buying lunch for herself and two friends. She has a coupon for $15 off the total bill and wants to spend less than $49 after using the coupon. The equation 3m - 15 < 49 can be used to find m, the average price of each friend's lunch. Determine which, if any, of the following values makes the eqauation true m=21; m=22; m=23

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

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%

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955