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jonny [76]
2 years ago
13

Find the number that makes the ratio equivalent to 3:1. :6

Mathematics
1 answer:
Agata [3.3K]2 years ago
8 0
The answer to this question is 2.
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3a/4+2a/3-a/12<br><br>a. a/3<br>b. 4/3<br>c. (4a)/3​
insens350 [35]

Answer: C

Step-by-step explanation:

\frac{3a}{4}+\frac{2a}{3}-\frac{a}{12}

Find the least common denominator of 4, 3, and 12.

4-3-12 | 3

4-1-4   | 4

1-1-1    |-------- 12

The first fractions needs to be multiplied by 3, and the second fraction, by 4

(\frac{(3a)*3}{(4)*3})+(\frac{(2a)*4}{(3)*4})-\frac{a}{12}

Solve;

\frac{9a}{12}+\frac{8a}{12}-\frac{a}{12}

Add the fractions with positive signs and subtract the one with negative sign.

\frac{(9a+8a)-a}{12}

Solve;

\frac{17a-a}{12}=\frac{16a}{12}

Simplify by 4;

16/4=4

12/4=3

\frac{4a}{3}

4 0
3 years ago
Read 2 more answers
A scientist inoculates​ mice, one at a​ time, with a disease germ until he finds 3 that have contracted the disease. If the prob
UkoKoshka [18]

Answer:

The probability that 8 mice are​ required is 0.2428.

Step-by-step explanation:

Given : A scientist inoculates​ mice, one at a​ time, with a disease germ until he finds 3 that have contracted the disease. If the probability of contracting the disease is two sevenths.

To find : What is the probability that 8 mice are​ required? The probability that that 8 mice are required is nothing ?

Solution :

Applying binomial distribution,

P(X=r)=^nC_r p^rq^{n-r}

Where, p is the probability of success p=\frac{2}{7}

q is the probability of failure q=1-p, q=1-\frac{2}{7}=\frac{5}{7}

n is total number of trials n=8

r=3

Substitute the values,

P(X=3)=^8C_3 (\frac{2}{7})^3 (\frac{5}{7})^{8-3}

P(X=3)=\frac{8!}{3!5!}\times \frac{8}{343}\times (\frac{5}{7})^{5}

P(X=3)=\frac{8\times 7\times 6}{3\times 2\times 1}\times \frac{8}{343}\times \frac{3125}{16807}

P(X=3)=0.2428

Therefore, the probability that 8 mice are​ required is 0.2428.

5 0
3 years ago
Help please. i have no idea how to do this.
Grace [21]

Answer:

ill help u lol im pretty positive its 8

5 0
2 years ago
The base of the triangle is 5<img src="https://tex.z-dn.net/?f=%5Csqrt%7B3%7D" id="TexFormula1" title="\sqrt{3}" alt="\sqrt{3}"
Vsevolod [243]

Answer:

yes you are absolutely right

it will be the answer

4 0
3 years ago
Hailey made the following statement
hichkok12 [17]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
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