What is the coefficient of y in the expression 2 ⋅ 3 + 9y? Which expression represents "7 times the sum of 4 and y?"

Four expressions are shown:

10x + 6

12x + 4

2(5x + 3)

2(6x + 2)

Which two expressions are equivalent to 2(5x + 2 + x)?

 Which expression is equivalent to 2a + 2a?​

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

Can someone answer this question for me

Plz ( true - false) all triangles have interior angles whose measure sum to 90.