Answer:
3c-6
Step-by-step explanation:
One day is c-2 so we need to multiply by 3. We get 3(c-2) or 3c-6.
Tip: use the variables/numbers in the problem to form an equation. Then, simplify.
Answer:
The number is 8.
Step-by-step explanation:
If the positive number is x then:
x^2 = 5x + 24
x^2 - 5x - 24 = 0
(x - 8)(x + 3) = 0
x =8, -3 .
x is positive so the answer is 8.
Answer:
1075/42
Step-by-step explanation:

4/5 = 8/10= 0. 80
make sense? any questions?
Coincident lines are lines that are the same.
In the beginning of both equations we have '4x' and '8x'.
Note that 8 / 4 = 2.
Multiply the rest of the numbers in the first equation by 2.
5y * 2 = 10y
8 * 2 = 16
So our 2nd line will be:
8x + 10y = 16