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tamaranim1 [39]
3 years ago
8

Simplify. 1/2b - 2/5b please i am begging u

Mathematics
2 answers:
DerKrebs [107]3 years ago
8 0
First, we need to find the LCD (Least Common Denominator) so we can subtract them much easier.

An easy way to find the LCD is to just multiply the denominators together: So 2 • 5 = 10

We have to do the same to the numerators too though.

1/2 (5) = 5/10

2/5 (2) = 4/10

Now, the remade expression is:

5/10 - 4/10 which will equal 1/10.

Hope it helped! If it did, please mark as Brainliest! :)
skelet666 [1.2K]3 years ago
3 0

Answer:

1/10​b

Step-by-step explanation:

subtract 1/2 and 2/5 and you get then answer just add the b at the end of your answer.

Hope this helps! :)

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In a recent survey, 40 percent indicated chocolate was their favorite flavor of ice cream. Suppose we select a sample of twelve
worty [1.4K]

Answer:

4 people name chocolate

Step-by-step explanation:

Let's first understand the given information.

The survey shows that 40 percent of a finite number of people name chocolate as their favorite flavor of ice cream. Because the survey is reporting a percentage, then 40% means that from 100 people 40 people name chocolate, while the others name a different type of flavor.

Dividing the total of people (100) by the ones who name chocolate (40) then we have:

100/40 = 2.5

Through the above equation we are actually expressing the following:

Total people = 2.5 * (people who name chocolate flavor)

Using this equation if we have now 12 people:

12 = 2.5 * (people who name chocolate flavor)

12/2.5 = (people who name chocolate flavor)

4.8 = people who chose chocolate flavor

Because we can't have 0.8 of a person, then if we have a sample of 12 people, we will expect that 4 of them name chocolate.

5 0
3 years ago
A bookstore sells textbooks for $80 each and notebooks for $4 dollars each. The bookstore would like to sell $800 in merchandise
mariarad [96]

Answer: 8 textbooks

Step-by-step explanation:

Sold 40 notebooks = 40 x $4 = $160

$800 - $160 = $640 left to sell

$640/$80 (cost of textbook) = 8 textbooks need to be sold

3 0
3 years ago
How do you shade 7 tenths our of a 100% block
almond37 [142]

to do this you would need to shade in 7 out of the 10 rows going horizontally or vertically it doesnt really matter as long as u shade in 7 rows of them

5 0
3 years ago
Read 2 more answers
Express 19/11<br> as a mixed number.
gogolik [260]

Answer:

1 8/11

Step-by-step explanation:

19/11

11 goes into 19 one time with 8 left over

put the 8 over the denominator

1 8/11

5 0
4 years ago
Read 2 more answers
Jill made a sauce in cooking class.She used 1/2 cup of milk, 2/3 cup of cream,and 1/4 cup of water. How much less water was used
otez555 [7]
Amount of milk and cream combined = 1/2 + 2/3 = (3 + 4)/6 = 7/6 = 1 1/6

Required amount = 7/6 - 1/4 = 14 - 3 = 11/12

Therefre, 11/12 less water is used than milk and cream combined.
7 0
3 years ago
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