How do you know whether you have to write a sum in simplest form

How many positive numbers from 1 to 999 have the sum of their digits equal to 8? For ex. the sum of digits in the numbers 62, 431, ... are equal to 8.

Is 2.6457513110 ... a rational number

Three friends split the cost of pizza and a salad. The pizza costs $15 and the salad costs $6.

The sum of 237 and six times the opposite of a number is 405. what is the number? a. - 28 b. - 24 c. 30 d. 32

Ben write the product of 7 and 50. Then he subtract the least three-digit multiple of 10 from the product. What is the difference?

Find the median of the following data set. 0.48, 0.66, 1.02, 0.82, 0.7, 0.94 0.44 0.76 1.02

The mark-up for a 75 dollar golf club is 80 dollars. Find the percent of the mark-up.

If sin a = 10 / 10 with a in qi and tan b = 4 3 with b in qi, find tan (a + b. and cot (a + b).

Write a proportion that could be used to solve for each variable. Then solve. 18 ounces in 6 bottles x ounces in 24 bottles a. 18/6 = x/24; x = 72 c. 6/18 = x/24; x = 8 b. 18/6 = x24; x = 82 d. 18/6 = 24/x; x = 9 (Worth 30 pts!)

A department store is having a 15% off sale on all winter coats. You purchase a winter coat for $275. The department store is located in a county with 7.25% sales tax. What is the discounted price of the winter coat? (NOT including sales tax)