Determine whether each of these integers is prime, verifying some of mersenne's claims.

a. 27 - 1

b. 29 - 1

carlos has a box of coins that he uses when playing poker with friends. the box currently contains 45 coins, consisting of pennies, dimes, and quarters. The number of pennies is equal to the number of dimes, and the total value is $3.84.

0.27 as a fraction or mixed number

Find the sum. 5x 7x - y + 4 y - 7x

Y=4x+6 2y=8x+12 tell weather is has one solution infinite solution or no solution

A track is 3/4 mile long. The track is measured in units called furlongs. One furlong is equivalent to 1/8 mile. How long is the track in furlongs? SHOW YOUR WORK!

Express your answer in decimal form (3/5-1/2) / 1/2 + 1.6 x (0.3 + 0.42) = What

Alma and Blanca are playing a game where they roll a pair of fair six-sided dice and try to predict the outcomes. Blanca thinks that the probability of rolling a one and a five is greater than the probability of rolling a one or a five.

Michael's little brother plays with the building blocks what are in the shape of a cube in a cube has an edge length of 15 mm what is the surface area of this Cube 15 mm2 90 mm2 1350 mm2 3375 mm2

How many rectangular faces does a pentagonal pyramid have?

The two leading digits of each 6-digit number add up to 23. Which digit could be in the ones place if the 4-digit number is divisible by 6.