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Tatiana [17]
3 years ago
13

(15y+27)

Mathematics
1 answer:
Rudiy273 years ago
6 0

Answer:

X = 2

Step-by-step explanation:

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Answer:

Both candles will have the same height after 4 hours.

Step-by-step explanation:

The equation for the amount of candle remaining can be given by the following equations:

Q(t) = Q(0) - at

In which Q(t) is the amount after t hours, Q(0) is the initial amount and a is how much it decreases, in inches, per hour.

Red candle:

8 inches tall and burns at a rate of 7 divided by 10 inch per hour. This means that Q(0) = 8, a = 7/10 = 0.7. So

Q_{r}(t) = 8 - 0.7t

Blue candle:

6 inches tall and burns at a rate of 1 divided by 5 inch per hour. This means that Q(0) = 6, a = 1/5 = 0.2. So

Q_{b}(t) = 6 - 0.2t

After how many hours will both candles be the same height ?

This is t when

Q_{r}(t) = Q_{b}(t)

8 - 0.7t = 6 - 0.2t

0.2t - 0.7t = 6 - 8[/yrc][tex]-0.5t = -2

Multiplying by (-1)

0.5t = 2

t = \frac{2}{0.5}

t = 4

Both candles will have the same height after 4 hours.

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4 years ago
On a certain map, 3 inches represents 15 miles. Briarwood and Middletown are 5 inches apart on the map. What is the actual dista
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If 3 inches represents 15 miles, then that means 1 inch represents 15/3 = 5 miles. That means that 5 inches represents 5 * 5 = 25 miles.

The answer is choice (A).

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3 years ago
Read 2 more answers
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-x+5y=20
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-x+5*20=20
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-100 from each side:
-x=-80
x=80

y=20
x=80

Hope this helps :)
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Uhh hundred? It's not possible...
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Answer:

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Step-by-step explanation:

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