Alex and Alyssa were given the expression 8 + 4(y + 3) +9y + 2. Alex added 8 and 4 to get 12 and then distributed the 12 through the parentheses. Alyssa disagrees, but couldn't explain her thinking. Who do you think is correct? Explain your thinking and then simplify the expression.

Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.