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ch4aika [34]
3 years ago
9

Simplify-3/7(y-28)-1/21y

Mathematics
1 answer:
Stells [14]3 years ago
7 0

Answer:

Step-by-step explanation:

I will assume that you meant:  (-3/7)(y-28) - (1/21)y

Using the distributive property of multiplication, we get:

(-3/7)y + (3/7)(28) - (1/21)y

Let's first reudce the middle term.  We get:  12

Then we have:

(-3/7)y + 12 - (1/21)y

Here there are two different denominators.  We must combine the y terms.  The LCD here is 21.  Multiplying (-3/7)y by 21/21, we get the equivalent:

-9y

------ + 12 - (1/21)y

 21

or:

-9y          21

------ + 12----- - (1/21)y

 21           21

Combining the y terms, we get (-10/21)y:

-10y      252

------- + -------- = (1/21)(-10y + 252)

 21          21

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2 years ago
at a country concert,the ratio of number of the Boys to the number of girls is 2:7 if there are 250 more girls than boys how man
sergey [27]

Answer:

100

Step-by-step explanation:

Ratio is a fraction, so ratio of boys to girls would be written as [let boys be "b" and girls be "g"]:

\frac{b}{g}=\frac{2}{7}

Also, there are 250 more girls than boys, so we can write:

g = 250 + b

Lets substitute this into "g" of the ratio we wrote and cross mulitply and solve for b:

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The number of boys = 100

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3 years ago
William is planning a party. He spent $110.74 to buy 9.8 pounds of candy for favors. What was the cost per pound of the candy? (
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Answer: $11.30 per pound

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William spent $110.74 to buy 9.8 pounds of candy.

To find the cost per candy, divide the amount spent by the quantity of candy:

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= 110.74 / 9.8

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The x axis is labeled as Number of days.

<h3 /><h3>What is graph?</h3>

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brainly.com/question/1509203

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