13. Here is one way Maleka proved that 2(5 + 2) + 2s is equivalent to
45 +4.
2(3 + 2) + 25 = 254 4 - 25
= 26.25.4
(2.2) 4
454
What properties of numbers and operations justify each step?

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15