Bag with 3 red marbles, 7 white marbles, and 5 blue marbles. You draw 3 marbles replacing one before drawing the next. What is the probability a red, blue and then white marble.

7/225

Step-by-step explanation:

There are 15 marbles in the bag. The probability of drawing a red marble is 3/15 = 1/5.  If you replace that marble, then the probability of drawing a blue marble is 5/15 = 1/3 and if you replace that marble, then the probability of drawing a white marble is 7/15.  Therefore, the probability of drawing a red, blue and white marble with replacement is (1/5)(1/3)(7/15) = 7/225

4 + 5 7/9= 9 7/9

step-by-step explanation:

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180