If isosceles triangle abc has a 130° angle at vertex b, which statement must be true?
mza = 15° and mc = 35°
mza + m2b = 155°
mza + m2 = 60°
mza = 20° and m_c = 30°
a

What expression is equivalent to 42x-56y

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.

One side of a rectangle is 7 centimeters shorter than six times the other side. find the length of the longer side if we also know that the perimeter of the rectangle is 266 centimeters.