Atwelve inch candle and an 18 inch candle are lit at 6pm. the 12-in. candle burns 1.5 inches every hour. the 18 inch candle burns three inches every hour. at what time will the two candles be the same height?

at 10 PM

Step-by-step explanation:

A 12 inch candle and an 18 inch candle are lit at 6 PM.

The 12 inch candle burns 1.5 inches every hour.

The 18 inch candle burns 3 inches every hour.

Let h represents hour.

The height of 12 inch candle burns after h hours = 12 - 1.5h

The height of 18 inch candle burns after h hours = 18 - 3h

Both candles will be the same height

       18 - 3h = 12 - 1.5h

          1.5h  = 18 - 12

          1.5h = 6

               h =

               h = 4

After 4 hours time would be = 6 Pm + 4 hours = 10 PM

At 10:00 PM the two candles be the same height.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

what i would say the best answer is a. 40.5