The answer to this equation 3x-4y=20
First, use division to determine the unit rate of one cookie (sorry if terminology is wrong, but i do know how to do it).
Little town = 9/$8 = $1.125 per cookie
College town = 30/$13 ≈ $2.3076 per cookie
Now we are sure of how much each costs and can determine how much she would have spent at each place.
Little town= $1.125*10= $11.25
College town= $2.3076*10≈ $23.08
Now, subtract little town from college town to figure out the savings.
23.08-11.25= $11.83
Thus, she saved $11.83.
Answer:
25/72
Step-by-step explanation:
P( blue) = blue / total = 4/12 = 1/3
P ( blue, blue) = 1/3 * 1/3 = 1/9
P ( red) = red / total = 5/12
P ( red, red) = 5/12 * 5/12 = 25/144
P ( green) = green /total = 3/12 =1/4
P ( green , green) = 1/4 * 1/4 = 1/16
Add these together to get
P( same colour twice) = 1/9+ 25/144 + 1/16
=16/144 + 25/144 + 9/144
=50/144
=25/72
Answer: x = 8, -4
Step-by-step explanation:
