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lesantik [10]
3 years ago
5

Tim used a lever to lift a heavy box off the ground. His input work was 50 J and the output work was 40 J. What was the mechanic

al efficiency of the lever?
A.90%
B.30%
C.80%
D.10%
Mathematics
1 answer:
solong [7]3 years ago
5 0
Answer:C

Explanation: 40 divided by 50 is .80
Equaling 80%

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Use Julia’s work and finish finding the areas of the faces what is the surface area of the rectangular pyramid
hoa [83]

Answer:

The surface area of the rectangular pyramid is SA=109.50\ m^{2}

Step-by-step explanation:

we know that

The surface area of the rectangular prism is equal to the area of the rectangular base plus the area of the four triangular faces

so

SA=(8)(5)+2[14.75]+2[\frac{1}{2}(8)(5)]

SA=40+29.50+40

SA=109.50\ m^{2}

6 0
3 years ago
At a ski resort, the cost of renting ski equipment for x days can be represented by the function
Andrews [41]

Answer:

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Step-by-step explanation:

h(x)=44x+8-(30x+15)

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7 0
3 years ago
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H over 3 plus 16 equals 18
3241004551 [841]

Answer:

If you're looking for H it could be 6

Step-by-step explanation:

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3 0
3 years ago
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What are possible coordinates of point F if triangle DEF is<br> congruent to triangle ABC?
Lemur [1.5K]

Answer:

(-1, 4)

Step-by-step explanation:

Point B is 5 units below point A, and point E is 5 units above point D: AB = ED. This means that BC will be equal to EF. B and C are 7 units apart, so 7 units left from E is (-1, 4).

Hope this helps!

8 0
3 years ago
What are the answers plz help me
Serga [27]

For number 3 it would be |-10| and |10|.

Number 5a is supposed to <, because -1 is greater than -7 when you look at the line graph. The same goes for 5b. 5d is >, because 0 is always greater than -1 and it shows that on the line graph that you have there. 5e is =.

I don't see anything else wrong though. Just the ones I listed.

Hope that helps!

8 0
3 years ago
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