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Svetach [21]
2 years ago
9

a teacher takes 15minutes to mark one question paper. how many hours will he take to mark 40 question papers?​

Mathematics
2 answers:
garri49 [273]2 years ago
6 0

Answer:

3 question papers

Step-by-step explanation:

If the teacher takes 15 minutes to mark 1 question paper. Then they will probably take 30 minutes to grade 2 question paper. Because 15 minutes+15 minutes=30 minutes. Then if you and another 15 minutes which will be 40 minutes because 15 minutes+15 minutes+15 minutes=40 minutes.

Hence, the teacher will mark 3 question papers in 40 minutes

Katyanochek1 [597]2 years ago
4 0

Answer:

It will take 13 hours 20 minutes

Step-by-step explanation:

The solution is in image

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What is a rational number?
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Step-by-step explanation:

A rational number is any number that can be divided (written as a fraction) by.

Examples: 1/2, 3, 5/9

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Martha wants to build a rectangular wooden border around the perimeter of her children's playground. She can find the perimeter
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Answer: The perimeter of Martha's wooden border = 44 feet.

Step-by-step explanation:

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Then, the perimeter of Martha's wooden border = 2(10)+2 (12) feet

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Therefore, the perimeter of Martha's wooden border = 44 feet.

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3 years ago
Merle has an offer from a credit card issuer for a 0% APR for the first 60 days and a 23.19% APR afterwards, compounded daily. W
Andreyy89

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2 years ago
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A rectangular mat has a length of 12 in. and a width of 4 in. Drawn on the mat are three circles. Each circle has a radius of 2
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7 0
3 years ago
write the equation of a line that passes through the points (5, -7) and is perpendicular to the line -2x + 6y = -4
VashaNatasha [74]

Answer:

y= -3x + 8

Step-by-step explanation:

Put -2x + 6y = -4 into slope-interceltp form

Take the negative reciprocal of the slope.

Use this reciprocal in point-slope form

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= y= -3x + 8

<em>(EDITED)</em> Steps:

2x+6y = -4

6y=2x - 4

y= 1/3x + 2/3

if two lines are perpendicular,

m1 * m2 + -1

1/3 * m2 = -1

m2 = -3

the line perpendicular to this line is

y = -3x + k ; k ∈ R

the line passes through the point (5,-7)

so,

-7 = -3. (5) +k

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k = 8

∴the equation of a line that passes through the point (5,-7) and is perpendicular to the line -2x+6y=-4 is

y= -3x + 8

Hope this helps, have a nice day/night! :D

6 0
2 years ago
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