there are three marbles in a bag. one is red and two are black. what is the probability of picking a red marble first, putting it back In the bag and then picking a black marble?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

You wanted to draw an enlargement of design that printed on a card that is 4 in by 5

Given: m zade = 60° and m2cdf = (3x + 15) prove: x = 15