how many of the first 80 positive integers can he written as the sum of two distinct powers of 3? for example, 28=27+1=3^3+3^0 can be expressed, but 29 cannot be.

Round 3.962 to the nearest hundredth

How to solve - 4 (6x + 3) = - 12 (x + 10)

3/8 of a mile is what

125 students have volunteered to be on the prom committee. 2 of those students will be randomly chosen to win free tickets to the prom. How many different ways can the winners be chosen?

thomas started a lawn-mowing business in Florida, in which he has x lawns on his route. his costs are $6 per lawn for fertilizer and $14 per lawn for labor. a) if he charges $25 per lawn, write a polynomial that represents his weekly profit.

What is reference angle for 150 degrees

Which function is decreasing? A. Price of a house as a function of size B. Numer of soft drinks sold at a ballpark as a function of outdoor temperature C. The time it takes the ice to melt as a function of temperature. D.

Assume that you select 4 coins at random from 8 coins: 6 dimes and 2 quarters. what is the probability that all of the coins selected are dimes? enter your answer as a fraction

What is the value of 2 in 5,678.321

Ken finished one-half of his homework problems at school. He finished two thirds of the remaining problems at home. He had 5 problems left. How many problems were there in total? A. 20 B. 25 C. 30 D. 40 E. 60