∠a and \angle b∠b are vertical angles. if m\angle a=(4x+23)^{\circ}∠a=(4x+23) ∘ and m\angle b=(5x-7)^{\circ}∠b=(5x−7) ∘ , then find the measure of \angle b∠b.

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48