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iogann1982 [59]
2 years ago
9

Of the students attending a rock concert, 80 of them were 8th graders. Of these 8th graders, 25% of them were wearing ear plugs.

Of these ear plug wearing students, 10% of them were male. How many of the 8th graders wearing earbuds were girls?
10
12
18
20

URGENT !!! pls show work :( ((my teacher likes to use proportions but i just need the answer!!))
Mathematics
1 answer:
zalisa [80]2 years ago
4 0
The answer is 18.

Show your work: You first need to find 25% of 80. To do that you need to remember that percent means per one hundred. Knowing this you need to do 25 divided by one hundred. This equals 0.25. Now to find the answer you will need to multiply both 0.25 and 80 to find 25% of 80. This will equal 20.
Now you will need to do the same with 10% of 20. 10 divided by 100 = 0.1 and times that by 20 = 2.
That will be how many boys are wearing ear plugs. To get the girls, all you will need is to subtract 2 from 20 = 18.
That’s why there is 18 girls wearing ear plugs.
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A recipe calls for 1 3/4 cups of bread flour and 1 2/3 cups of whole wheat flour. what is the total amount of flour used in the
Ivahew [28]

1 \frac{3}{4}  = 1.75 \\ 1 \frac{2}{3}  = 1.66
so
1.75 + 1.66 = 3.41 \\ 3.41 = 3 \frac{5}{12}
6 0
2 years ago
F(x)=x+2,translation 2 units right
weeeeeb [17]

Answer:

when you translate you move the "x" term.  

so moving to the right is x-2 (sign opposite of direction)

g(x) = (x-2) + 2

Step-by-step explanation:

8 0
3 years ago
The answer to this problem?
LenaWriter [7]

The simplified expression of \sqrt{\frac{162x^9}{2x^{27}}} is \frac{9}{x^9}

<h3>How to simplify the expression?</h3>

The expression is given as:

\sqrt{\frac{162x^9}{2x^{27}}}

Divide 162 and 2 by 2

\sqrt{\frac{81x^9}{x^{27}}}

Take the square root of 81

9\sqrt{\frac{x^9}{x^{27}}}

Apply the quotient rule of indices

9\sqrt{\frac{1}{x^{27-9}}}

Evaluate the difference

9\sqrt{\frac{1}{x^{18}}}

Take the square root of x^18

\frac{9}{x^9}

Hence, the simplified expression of \sqrt{\frac{162x^9}{2x^{27}}} is \frac{9}{x^9}

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brainly.com/question/723406

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5 0
1 year ago
A donut store has 11 different types of donuts. You can only buy a bag of 3 of them, where each donut has to be of a different t
MakcuM [25]

Answer:

165.

Step-by-step explanation:

Since repetition isn't allowed, there would be 11 choices for the first donut, (11 - 1) = 10 choices for the second donut, and (11 - 2) = 9 choices for the third donut. If the order in which donuts are placed in the bag matters, there would be 11 \times 10 \times 9 unique ways to choose a bag of these donuts.

In practice, donuts in the bag are mixed, and the ordering of donuts doesn't matter. The same way of counting would then count every possible mix of three donuts type 3 \times 2 \times 1 = 6 times.

For example, if a bag includes donut of type x, y, and z, the count 11 \times 10 \times 9 would include the following 3 \times 2 \times 1 arrangements:

  • xyz.
  • xzy.
  • yxz.
  • yzx.
  • zxy.
  • zyx.

Thus, when the order of donuts in the bag doesn't matter, it would be necessary to divide the count 11 \times 10 \times 9 by 3 \times 2 \times 1 = 6 to find the actual number of donut combinations:

\begin{aligned} \frac{11 \times 10 \times 9}{3 \times 2 \times 1} = 165\end{aligned}.

Using combinatorics notations, the answer to this question is the same as the number of ways to choose an unordered set of 3 objects from a set of 11 distinct objects:

\begin{aligned}\begin{pmatrix}11 \\ 3\end{pmatrix} &= \frac{11 !}{(11 - 3)! \times 3 !} \\ &= \frac{11 !}{8 ! \times 3 !} \\ &= \frac{11 \times 10 \times 9}{3 \times 2 \times 1} = 165\end{aligned}.

5 0
2 years ago
Ms.Malone received $3.40 in change. What is the amount as a fraction in simplest terms.
sammy [17]
To write 3.40 as a fraction you have to write 3.40 as numerator and put 1 as the denominator. Now you multiply numerator and denominator by 10 as long as you get in numerator the whole number.
3.40 = 3.40/1 = 34/10

And finally we have:
3.40 as a fraction equals 34/10 simplified we get: 3 2/5
3 0
3 years ago
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