There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 7 8 . There are 72 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be.

63 red marbles.

Step-by-step explanation:

Because the probability of drawing a red marble is 7/8, the number of red marbles = 7/8 * 72

= 7 * 9

= 63.

hey seth! : )

i’m not 100% sure, but i think it’s b

hope this ya : p

miss u!

- nicole

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq