A bag contains 7 marbles. Some marbles are red and some are blue. If the probability of drawing two blue marbles is 10/21 how many blue marbles were in the bag when the experiment started? A.3
B.4
C.5
D.6

Is there an x intercept in the equation 60*1.15^x

Simplify. 3(4+4x) (type your answer in with no spaces)

Vikram is studying the square pyramid below. on st to find the surface area of the pyramid, in square inches, vikram wrote (33.2) (34 ikram wrote (33.2)(34.2)+43(34.2)(284) what error did vikram make? o he used the same expression for the area of all four lateral faces. he used the wrong expression to represent the area of the base of the pyramid. o he used the wrong value as the height when he found the area of the lateral faces. he used an expression for surface area that only finds the total area of three faces.