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SSSSS [86.1K]
3 years ago
11

Company charges 10 cent per kilowatt an hour of electricity. How much does it cost to operate a chandelier with five 75 watt lig

ht bulbs for 90 minutes?
Mathematics
1 answer:
UNO [17]3 years ago
5 0

Answer:

  5.625¢

Step-by-step explanation:

The amount of energy used by the chandelier is ...

  5 × 0.075 kW × 1.5 h = 0.5625 kWh

At 10¢ per kWh, the cost will be ...

  0.5625 kWh × 10¢/kWh = 5.625¢ . . . . cost of operation for 90 minutes

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Maurinko [17]

Answer: x³+y³=180

Step-by-step explain:                                                                                            let's remember the formula                                                                                 x³+y³=(x+y)(x²-xy+y²) and also  x³+y³=(x+y)³-3xy(x+y)                                              then                                                                                      \displaystyle\boldsymbol{ x^3+y^3=\underbrace{(x+y)^3}_{6}-3\underbrace{xy}_{2}\underbrace{(x+y)}_6}=\\\\6^3-3\cdot 2\cdot 6=216-36=180                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

6 0
3 years ago
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dedylja [7]
4(51)-6
x=198 i wanna say that’s the answer
6 0
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Step-by-step explanation:

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8 0
2 years ago
92 + x2 = (x + 4)?<br> *Use the value of x to find the radius
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Answer:

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Step-by-step explanation:

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5 0
3 years ago
The six-digit number 63X904 is an even multiple of 27. What does the digit X represent?
olga2289 [7]
Let's solve this problem step-by-step.

STEP-BY-STEP SOLUTION:

To begin with, let's establish that ( x ) can equal to any number from 0 to 9.

Meaning, that ( x ) is equal to one of the following: 0, 1, 2, 3, 4, 5, 6, 7, 8 or 9.

Now that we know which values ( x ) can equal to, we will simply substitute each of the numbers as potential values of ( x ) into the six-digit number and divide it by 27 to see if it is a multiple of 27.

If X = 0

= 63X904 / 27

= 630904 / 27

= Not a whole number

Therefore, X is not equal to 0.

If X = 1

= 63X904 / 27

= 631904 / 27

= Not a whole number

Therefore, X is not equal to 1.

If X = 2

= 63X904 / 27

= 632904 / 27

= Not a whole number

Therefore, X is not equal to 2.

If X = 3

= 63X904 / 27

= 633904 / 27

= Not a whole number

Therefore, X is not equal to 3.

If X = 4

= 63X904 / 27

= 634904 / 27

= Not a whole number

Therefore, X is not equal to 4.

If X = 5

= 63X904 / 27

= 635904 / 27

= 23552

ANSWER:

Therefore, the answer is:

X = 23, 552

Please mark as brainliest if you found this helpful! :)
Thank you <3
8 0
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