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shutvik [7]
3 years ago
10

It takes 1200 j of work to lift the car high enough to change a tire.how much work must be done by the person operating the jack

if the jack is 25 percent efficient?
Mathematics
1 answer:
Law Incorporation [45]3 years ago
8 0
 Simply divide 1200 j by 25%

1200 J  / \frac{25}{100} = 1200 J * \frac{100}{25} = 4800 J

The answer would be 4800 J
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Which ordered pair is a reflection of (3,7) across the x-axis?
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Answer:

(3,-7)

Step-by-step explanation:

Using the algebraic rule for Rx-axis

(x,y)---->(x,-y)

(3,7)--->(3,-7)

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On a drawing, the scale is 1 centimeter to 30 centimeters. Which of the following is not correct? actual length = 150 cm; drawin
Brrunno [24]

Answer:

drawing length = 7 cm; actual length = 200 cm

Step-by-step explanation:

The ratio is 1 cm in the drawing is 30 cm in actuality.

If the drawing is 5 cm, multiply by 5

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5cm drawing = 150 cm actual

11cm drawing  multiply by 11

11*1= 11 and 11*30 = 330 cm

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7cm drawing  multiply by 7

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7 cm drawing = 210 cm actual

8cm drawing  multiply by 8

The one that is not correct: drawing length = 7 cm; actual length = 200 cm

8*1= 8 and 8*30 = 240 cm

8 cm drawing = 240 cm actual

3 0
3 years ago
Abbie opened a no-interest bank account with $20, and she deposits $14.50 every week. Carlos opened a no-interest bank account w
Kazeer [188]

Answer:

4 weeks

Step-by-step explanation:

14.50 (4) + 20= 78

12.50 (4) + 28= 78

8 0
3 years ago
How do you find 12.54 as a fraction
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Write 12.54 as 12.54/1. Multiply both numerator and denominator by 10 for every number after the decimal point
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8 0
4 years ago
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