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Lelechka [254]
2 years ago
7

Ralph bought 3 boxes with 20 pencils each and 4 boxes with 10 pens each. To find the total number of pencils and pens, Ralph eva

luated 3 X 20 + 4 X 10 = 100. Is his answer reasonable? Explain.​
Mathematics
2 answers:
Licemer1 [7]2 years ago
5 0
Answer:

Yes. His answer is reasonable.

Explanation:

3 x 20 = 60

4 x 10 = 40

60 + 40 = 100
VMariaS [17]2 years ago
4 0

Answer:

yes, his answer is reasonable because three times twenty is sixty, and four times ten is forty. sixty plus forty is 100.

Step-by-step explanation:

3x20=60

4x10=40

40+60=100

You might be interested in
4-8m=-8-5m what is m​
faust18 [17]

Answer:

-9m-4

Step-by-step explanation:

Move the -4 to the right hand side by adding 4 to both sides, like this: To the left hand side:

-4 + 4 = 0

9m ‹ 5m

6 0
2 years ago
The sum of 8 and y is 5. what is y​
marshall27 [118]

Answer:

y = -3

Step-by-step explanation:

As per the condition given

8 + y = 5

y = 5 - 8 = -3

7 0
2 years ago
Solve the quadratic equation for x in the simplest equation -6x^2+15x+9=0
Alexus [3.1K]

Answer:

x = 3, -1/2

Step-by-step explanation:

Use the quadratic formula:  x = [-b ± √b² - 4ac]/2a

The square root sign should be over the entire expression b² - 4ac

In this problem, a = -6, b = 15, and c = 9

So, putting in those values, we get x = -15 ± √225+216, all divided by -12

Simplifying further, we get -15 ± 21 all divided by -12, or -36/-12 = 3 OR

6/-12 = -1/2

6 0
3 years ago
5
Elanso [62]

Pile Y has the greater mean number of pages per book because it is 5 books less than pile W.

<h3>How to calculate greater mean number of pages?</h3>

From the complete information, we can deduce that the number of each pile of book is given as follows:

<u>For pile W;</u>

Red books = 10 × 5 = 50 red books.

Blue books = 5 × 5 = 25 blue books.

Therefore, total books in pile W = 50 + 25 = 75 books.

Mathematically, the mean for each pile can be calculated by using the following formula:

Mean = [F(x)]/n

Mean = 75/10

Mean = 7.5.

<u>For pile Y;</u>

Red books = 10 × 5 = 50 red books.

Mean = [F(x)]/n

Mean = 50/5

Mean = 10.

In conclusion, pile Y has the greater mean number of pages per book because it is 5 books less than pile W.

Read more on mean here: brainly.com/question/9550536

#SPJ1

4 0
2 years ago
How to do this here
pogonyaev

Answer:

Step-by-step explanation:

6 0
2 years ago
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