30 marbles in a bag. 10% of them were blue and 60% of them were red. The rest are yellow. How many of the marbles are yellow?

Solve x2 + 4x - 12 = 0.

The mean radius of Earth is 6,371.0 kilometers and the mean radius of Earth's Moon is 1,737.5 kilometers.

A passenger on a ship dropped his camera into the ocean. If it is descending at a rate of - 4.2 meters per second, how long (in seconds) until it hits the bottom of the ocean, which is at - 1875 meters? Round to the nearest second.

Which equation represents this number sentence? The quotient of 7 and a number is 10 less than 3 times the number

The sum of a number and its is zreo

Solve 2 (4 x + 3) < 5 x + 21.

Solve. 9|y| + 17 = 53

Samuel uses cubes of the same size as the small cubes to make a cuboid twice as long, three times as wide and four times as high as Edmund's cube. How many more cubes does Samuel use than Edmund?

Write this number in word form. 4,000,000+50,000+2,000+600+8

2) Write an integer to best describe the following situation: 6 feet below sea level