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Dvinal [7]
3 years ago
9

Efficiency is the ratio of output work to input work, expressed as a percentage. Light bulbs put out less light energy than the

amount of electrical energy that is put into the bulb. An illustration of a wide arrow with a light bulb at the tail of it labeled electrical energy 100 J, breaks into a small arrow going forward labeled light 10 J and a larger curling away labeled heat 90 J. The goal of the bulb is to produce light. What is the efficiency of this bulb as it works to put out light? 10% 80% 90% 100%
Mathematics
1 answer:
grandymaker [24]3 years ago
7 0

Answer:

  10%

Step-by-step explanation:

Using the given formula with the given data, we have ...

  efficiency = output work / input work

  = (10 J)/(100 J) = 0.10 = 10%

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anyanavicka [17]

Answer: 9

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7 0
3 years ago
The graph of a linear equation contains the points (3,11) and (-2,11). Which point also lies on the graph?(YOU MUST SHOW WORK)
dexar [7]
Y= ax+b

when x=3, y=11   and when x= -2, y=11
          3a+b=11
          -2a+b=11    | * -1
3a+b=11
2a-b=-11
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⇒ b=11
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So ( 1,11)  or (2,11) are also points on the graph
3 0
3 years ago
What is the solution to this system of linear equations?
SOVA2 [1]

(7,3)

Step-by-step explanation:

X= -2+3y

....

-2+3y-3y=-2

-2+3y+3y=16

.......

6y=18

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y=3

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6 0
3 years ago
Read 2 more answers
In California in 2000, the ballot included an initiative to add "none of the above" to the list of options in all candidate race
sveticcg [70]

Answer:

No, because the sample was randomly selected.

Step-by-step explanation:

In this example, the main element that we need to focus on is the way in which the sample was determined. We learn that the sample was taken in California with 1000 people. However, this sample was random, and the survey was conducted in both English and Spanish. The fact that this was a random sample means that it is representative of the population. The size of the population does not affect the accuracy of a random sample.

4 0
3 years ago
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GREYUIT [131]

Answer:

Step-by-step explanation:

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2y=-8x+16

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slope is -4

y-intercept is (0,8)

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8 0
2 years ago
Read 2 more answers
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