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aalyn [17]
3 years ago
9

Lee watches tv for 3 hours per day. During that time the tv consumes 250 watts per hour. Electricity costs 12 cents/1 kilowatt-h

our. How much does it cost to run the tv does 30 days?
Mathematics
1 answer:
Leona [35]3 years ago
4 0

Answer:

270 dollars

Step-by-step explanation:

He's going to watch 90 hours of tv in 30 days, so multiply 90 hours x 250 watts, Which is 22500 watts over 30 days, then convert to kilowatts which would be 22.5 kilowatts total. He used .25 kilowatts an hour every day. Then multiple 22.5 x 12 cents to get your answer 270. He paid 270 dollars for electricity for the tv.

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3 years ago
Which of the following graphs shows the solution for the inequality<br> y-4&gt; 2(x+2)?
timofeeve [1]

Answer:

Answer:

Graph C shows the solution for the inequality

Step-by-step explanation:

y - 4 > 2(x + 2)

y > 2x + 4 + 4

y > 2x + 8

Let y = 2x + 8, Then

X-intercept (0, 8)

Y-intercept (-4, 0)

Since the inequality sign is > we use broken line.

Put,  (0, 0)

y > 2x + 8

0 > 0+ 8

0 > 8 Which is false

so, the answer will be above the broken line

Hence , Graph C shows inequality

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5 0
2 years ago
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m_a_m_a [10]

Answer:

(a + 3)

Step-by-step explanation:

a³ - 9a = a(a² - 9) = a(a + 3)(a - 3)

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HCF = (a + 3)

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7 0
3 years ago
Shawna climbed 5 flights of stairs. There were 9 steps in each flight. How many steps did Shawna climb?
exis [7]

Shawna will climb 45 steps

The first step is to write out the parameters given in the question

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The number of steps can be calculated by multiplying the number of flight of stairs by the number of steps

= 9 × 5

= 45

Hence there are 45 steps for Shawna to climb

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2 years ago
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Yuliya22 [10]

Answer:

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Step-by-step explanation:

3 0
3 years ago
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