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3 years ago

5. How many even positive integers less than 600 can be written using

Mathematics

1 answer:

Alinara [238K]3 years ago

5 0

Answer:

The answer to this question is: 44.

Step-by-step explanation:

The even numbers that we can form with the numbers 2,4,5 and 8 are:

2, 4, 8, 22, 24, 28, 42, 44, 48, 52, 54, 58, 82, 84, 88, 222, 224, 228, 242, 244, 248, 252, 254, 258, 282, 284, 288, 422, 424, 428, 442, 444, 448, 482, 484, 488, 522, 524, 528, 542, 544 and 582, 584, 588.

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Alex took 31 exams for 5 years studying at the MaPhAs University. Each year, he took more exams than the previous year. During h

katen-ka-za [31]

Answer:

The fourth year he took 8 exams

Step-by-step explanation:

We must do it by trial and error:

We must start from the first year:

A = 1 exam

If the first year he took 1 exam, the last year he did 3, but this answer is not possible because the rule that the more the years pass, the more exams he does, is not fulfilled.

A = 2 exams

In this case, if it is true that each year increases, but it does not meet the total rule, since:

Year 1 = 2

Year 2 = 3

Year 3 = 4

Year 4 = 5

Year 5 = 6

2 + 3 + 4 + 5 + 6 = 20

A = 3 exams

Therefore the fifth year would be 9, therefore it would be:

Year 1 = 3

Year 2 = 4

Year 3 = 5

Year 4 = 6

Year 5 = 9

3 + 4 + 5 + 6 + 9 = 27

This means that we are missing 4 units to reach 31, therefore we must add 4 units between years 2, 3 and 4, but always bearing in mind that each year should increase with respect to the previous one.

If we add 2 exams to year 4, 1 exams to year 3 and 1 exam to year 2, we would have the following results:

Year 1 = 3

Year 2 = 5

Year 3 = 6

Year 4 = 8

Year 5 = 9

3 + 5 + 6 + 8 + 9 = 31

Which means that in the fourth year he took 8 exams

8 0

3 years ago

7 more than 3 times a number is 52

Scrat [10]

15, because 52 minus 7 is 45, and 45 divided by 3 is 15.
15 x 3 + 7= 52

4 0

3 years ago

A recipes calls for 40 ounces of rice . How many grams of rice does the recipe require

alekssr [168]

Answer:

I honestly don’t know

Step-by-step explanation:

5 0

3 years ago

12am=4 solve for a help!!!

Vitek1552 [10]

I hope this helps you

3 0

3 years ago

Read 2 more answers

Total Surface Area = ? 2 in 5 in 6 in

matrenka [14]

P.S: Your question is incomplete. Please consider attaching a picture to your question.

Answer:

Surface area = 104 in.

Step-by-step explanation:

We know that:

Side lengths of rectangular prism: 2 in, 5 in, and 6 in.
Surface area = Area of all faces

Solution:

Surface area = 2(6 x 2) + 2(5 x 2) + 2(6 x 5)
=> Surface area = 2(12) + 2(10) + 2(30)
=> Surface area = 24 + 20 + 60
=> Surface area = 104 in.

Hence, the surface area of the rectangular prism is 104 in.

4 0

3 years ago