Answer:
The choice two

Step-by-step explanation:

Marcia can write an expression for the number of candles she will have at the end of "h" hours. She can also write an expression for the number of candles Kevin will have at the end of "h" hours. She can set the two expressions equal to each other and solve for "h", the number of hours until each has the same number of candles.
<span>5h = 4h+7 </span>
<span>h = 7 … subtract 4h from each side </span>
<span>In 7 hours, each will have the same number of candles.</span>
Answer:
its c
Step-by-step explanation:
i had the same question on my test
True, if a points works in both equations of a linear system, then that point is the solution.
Answer:
Multiplication is commutative.
Step-by-step explanation:
Let n,m be two natural numbers.
We have to show that 
We will prove this by induction
For n = 1, we have
, which is true.
Let the given statement be true for n-1 natural numbers, that is,

Now, we have to show that it is true for n natural numbers.

which is equal to




Hence, by principal of mathematical induction, the given statement is true for all natural numbers.