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-BARSIC- [3]
3 years ago
6

A teacher gave a test with 50 questions, each worth the same number of points. Donovan got 40 out of 50 questions right. Marci's

score was 90%. How many more questions did Marci answer correctly?​
Mathematics
2 answers:
bekas [8.4K]3 years ago
5 0

Answer:

Marci answered five more questions correctly

Step-by-step explanation:

40/50 questions would result in 80% correct.

So, 90% correct would mean 45/50 questions were answered correctly.

Finger [1]3 years ago
3 0

Answer:

10

Step-by-step explanation:

So basically Donnovan got 80 put of 100 and that equals 80% so 90%-80% is 10%

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SOVA2 [1]

Answer:

A no. is correct one

Step-by-step explanation:

Hope it will help you. and please mark me brilliant

4 0
2 years ago
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HELP MEEEEEEEEEEEEE PLZZZZZZZZZZZZ
Leona [35]

Let's say we wanted to subtract these measurements.

We can do the calculation exactly:

45.367 - 43.43 = 1.937

But let's take the idea that measurements were rounded to that last decimal place.  

So 45.367 might be as small as 45.3665 or as large as 45.3675.

Similarly 43.43 might be as small as 43.425 or as large as 43.435.

So our difference may be as large as

45.3675 - 43.425 = 1.9425

or as small as

45.3665 - 43.435 = 1.9315


If we express our answer as  1.937 that means we're saying the true measurement is between 1.9365 and 1.9375.  Since we determined our true measurement was between 1.9313 and 1.9425, the measurement with more digits overestimates the accuracy.

The usual rule is to when we add or subtract to express the result to the accuracy our least accurate measurement, here two decimal places.

We get 1.94 so an imputed range between 1.935 and 1.945.  Our actual range doesn't exactly line up with this, so we're only approximating the error, but the approximate inaccuracy is maintained.


7 0
3 years ago
Read 2 more answers
Find the second of two consecutive integers if the second is 13 less than twice the first.
emmasim [6.3K]
What is the range in which the integers can be in? I cannot fully answer this question. But I think there could be more than one answer. One answer would be the first is 36 and the second is 66.

Hope this helps!
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4 0
3 years ago
What is this for 2nd grade math. 247+?=673
icang [17]

Answer:

426

Step-by-step explanation:

Subtract 247 from 673 to get 426

7 0
3 years ago
What is the perimeter of this pentagon?
labwork [276]

Answer: 8/5

Step-by-step explanation: I hope this helps!!!!

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3 years ago
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