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3 years ago

5

Nine tenths of the grade 9 class are in the gym. If these students are divided into three equal groups, what fraction of the cla

ss will be in each group?

1 answer:

Dahasolnce [82]3 years ago

3 0

Times by 3. Then divide the top backup by 3 to get 9/30. 9/30+9/30+9/30=27/30=9/10.

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What is the answer to 5-1/3n=-2

Free_Kalibri [48]

Answer:

21 = n

Step-by-step explanation:

$5 - \frac{1}{3}n = -2$

-5 - 5

________________

-⅓<em>n</em> = -7

____ __

-⅓ -⅓

21 = <em>n</em>

* Dividing by a fraction is the exact same as multiplying by its <em>multiplicative</em><em> </em><em>inverse</em>:

$\frac{-7}{-\frac{1}{3}} = -7 \times -3 = 21$

I am joyous to assist you anytime.

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3 years ago

What is 10 squared plus b squared equals 22 squared

klio [65]

I'm pretty sure you are asking for the value of b. Let's actually write it and then solve it:
$10^2 + b^2 = 22^2$

Solving for b yields:
$b = \sqrt{22^2-10^2} = \sqrt{484-100} = \sqrt{384} = 19.59$

So, b = 19.59. If you want the answer in simplified radical form, we can also do that:
$\sqrt{384} = \sqrt{16*24} = 4 \sqrt{24} = 4 \sqrt{4*6} = 8 \sqrt{6}$

So, b = 8√6 = 19.59

4 0

2 years ago

CAN SOMEONE HELP ME !!!!!!!!!

MissTica

Answer:

She will get <u>80mg</u> of dextromethorphan and <u>800mg</u> of guaifenesin. And the bottle last for <u>6 days</u> approximately.

Step-by-step explanation:

Given that the Robitussin DM contains dextromethorphan 10mg/5mL and gualfenesin 100mg/5mL. And we are also given that Mrs Smith took four doses and each dose is 2 teaspoons=2X5=10mL.

So, four doses=4X10=40mL.

So, dextromethorphan in 4 doses is = $\frac{10}{5}X40=80mg$

And Guaifenesin in 4 doses is = $\frac{100}{5}X40=800mg$

Dosage of medicine daily she has to take=40mL and the bottle contains 237 mL. Hence the number of days bottle last = $\frac{237}{40}=5.925$ ≈6 days approximately.

7 0

2 years ago

Help please last question

s344n2d4d5 [400]

Answer: 27%

explanation:

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2 years ago

Oil is often measured in barrels one barrel can hold the 42 gallons of oil how many gallons of oil can 7 barrels hold

svetoff [14.1K]

294 gallons of oil is the answer because you do 42 and mltiply it by 7

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2 years ago