3(y – 1) + 2(y + 3) = 13
Distributive Property

y=2

Step-by-step explanation:

3(y–1)+2(y+3)=13

(3y–3+2y+6=13)this has written in distributive property

3y+2y–3+6=13

5y+3=13

5y=13–3

5y=10

5y/5=10/5

y=2

answer: 12   they all have at least 28 days

step-by-step explanation: haha

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.