Marcia can make 5 candles in an hour. kevin can make only 4 candles in an hour, but he already has 7 completed candles. how can marcia use a system of equations to determine when she will have the same number of candles as kevin?

After 7 hours.

Step-by-step explanation:

Let Marcia and Kevin can make candles in h hours.

Now Marcia can make 5 candles per hour

so total number of candles made = 5h

similarly Kevin can make only 4 candles in one hour.

So total candles made in h hours = 4h

But Kevin has already completed 7 candles so total candles made by Kevin = (4h + 7)

Now it is given that both Marcia and Kevin made same number of candles in h hours.

so 5h = (4h + 7)

    5h - 4h = 7

     h = 7

After 7 hours candles made by both Marcia and Kevin will be same.

could

step-by-step explanation:

u send me a picture of ur work

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents