Answer:
You can use Unit rate to find the answer. (Divide)
Step-by-step explanation:
Answer:
8.0
Step-by-step explanation:
The attached shows guesses until we have an answer accurate to 6 decimal places. Rounded to 1 decimal place, the answer is 8.0 years.
This (8 years) was our initial guess, based on the "rule of 72" which says the doubling time for 9% interest is 72/9 = 8 years.
Our second guess, at 8.1, was farther away from the doubled value, so the first guess at 8.0 is closer.
t = 8.0
The system of equations according to the given information is the following:
x=7+y
3x+2y=96
There are multiple ways to solve this, but using addition is probably the fastest. Rearrange the equations into corresponding formats like this:
x-y=7
3x+2y=96
Then match the coefficients of one of the variables:
2x-2y=14
3x+2y=96
Then add the two equations together to find x:
5x=110
x=22 cars
So Leonard has 22 cars, and since he has seven more cars than Liam, Liam has 15 cars.
Y = 3x
How to solve:
y2 - y1/x2-x1
27-15/9-5
= 12/4 = 3
Looks like you got it already :)