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JulsSmile [24]
3 years ago
8

Charity reads 3 pages every 4 minutes at this rate how many pages can she read In 30 minutes

Mathematics
1 answer:
xenn [34]3 years ago
4 0

speed that she is reading= 3pages/4min

=3/4 page/min

in 30 min she can read= 3/4 page/min × 30min

= 90/4 page

= 22.5pages

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Diego's history teacher writes a test for the class with 26 questions. The test is worth 123 points and has two types of questio
maxonik [38]

Answer:

The number of essay questions on the test were 9

Step-by-step explanation:

Given as :

Total number of questions in a test = 26

Total points for the 26 questions = 123

The point for each multiple choice questions = 3

The point for each essay questions = 8

Let The number of multiple choice questions = m

Let The number of essay questions = e

<u>Now, According to question</u>

Total number of questions in a test = number of multiple choice questions +  number of essay questions

Or, m + e = 26         .....A

Again

Total points for the 26 questions =  point for each multiple choice questions  ×  number of multiple choice questions + point for each essay questions × number of essay questions

i.e 3 × m + 8 × e = 123

Or, 3 m + 8 e = 123          .......B

Solving the equation we get

8 × ( m + e ) - (3 m + 8 e) = 8 × 26 - 123

Or, 8 m + 8 e - 3 m - 8 e = 208 - 123

Or,(8 m -  3m) + (8 e - 8 e) = 85

Or, 5 m + 0 = 85

∴  m = \dfrac{85}{5}

i.e m = 17

So,The number of multiple choice questions = m = 17

Put the value of m into eq A

∵ m + e = 26

Or, e = 26 - 17

i.e e = 9

So, The number of essay questions = e = 9

Hence, The number of essay questions on the test were 9 . Answer

7 0
3 years ago
There are two sets of traffic lights outside Eric's house. One day, he times how often they change. Set A turns green every 60 s
Otrada [13]

Answer:

12:07pm

Step-by-step explanation:

first common multiple of 60 and 70 is 420

420 s = 7 mins

3 0
3 years ago
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Step-by-step explanation:

We can find N with 2584 and 4181.

4181 - 2584

= 1597

We can also check our answer by adding 1597 and 987

1597 + 987

= 2584

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2 years ago
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