Answer:
33
Step-by-step explanation:
Let's call their ages m and b.
We have:
m = b + 12
m - 17 = 4(b - 17) → m = 4b - 51
b + 12 = 4b - 51
3b = 63
b = 21
m = 21 + 12 = 33
How much tax do you pay? $0.30
How much of a tip should you leave? $1.20
What is the total cost of your meal, after tax and tip? $7.50
We have been given that Mark had $436.
Further, we are given that Chris has $86 lesser than what mark had.
Let us assume that Chris has $x. Therefore, we can set up an equation:
(Amount Chris had) + $86 = (Amount Mark had)

Upon subtracting 86 from both the sides, we get:

Therefore, the required expression that represent the amount of money that Chris had is
.
Answer:
response variable- time required for water to turn to ice
control group- second freezer
explanatory variable- new formula
Step-by-step explanation: