Answer:
y=0,y=7/5,y=-9/4
Step-by-step explanation:
12y(5y-7)(4y+9)=0
Using the zero product property
12y =0 (5y-7) =0 (4y+9)=0
12y/12 =0/12 5y-7 +7 =0+7 4y+9-9=0-9
y =0 5y = 7 4y = -9
5y/5 = 7/5 4y/4 =-9/4
y = 7/5 y =-9/4
Andy's age = x
Jeff's age = x-2
Andy's age in five years = x+5
Jeff's age in five years = x-2+5
The sum of their ages in five years = x+5 + x-2+5
x + 5 + x - 2 + 5 = 40
2x + 8 = 40
<u> -8 -8</u>
2x = 32
<u> :2 :2</u>
x = 16
x - 2 = 14
<u>Andy is 16 years old and Jeff is 14 years old</u>
We have to mutiply factor -2/3 times every agument from the parenthesis.
/+8b
8+6b=-4 /-8
6b=-12 /:6
b=-2 - its the answer
7 brown, 3 yellow, 8 red...total of 18 cards
there are 15 cards not yellow and a total of 18 cards....so the probability of not picking a yellow card is : 15/18 rounds to 5/6