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kodGreya [7K]
3 years ago
5

Does anyone one how to solve this problem

Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0
( \frac{2}{3} - \frac{1}{6} )÷( \frac{2}{5} - \frac{1}{3} )
The first thing you must do it to solve the fractions inside the parentheses first
\frac{2}{3} - \frac{1}{6} = \frac{4}{6} - \frac{1}{6} which is \frac{3}{6} or \frac{2}{3}because you must get a common denominator in order to solve. The common denominator is 6. So you must multiply in order to get 6. \frac{2}{3} *6= \frac{3}{6} Then you do the other fraction: \frac{2}{5} - \frac{1}{3}= \frac{6}{15}  - \frac{5}{15} which is \frac{1}{15} because 15 is the common denominator and you must multiply the denominator to get 15, thus, you must multiply by the same amount for the numerator. So now it is \frac{3}{6}÷\frac{1}{15} but when dividing, you just need to flip-flop the second fraction and then multiply across. Now it is \frac{3}{6} * \frac{15}{1} = \frac{45}{6} But to simplify, you find a common factor which is 3.
45÷3=15 and 6÷3=2 which is now \frac{15}{2}
You answer is C)\frac{15}{2}
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The school track team earned $2 for each cap they sold and $5 for each sweatshirt they sold. The total profits were $317. If the
Feliz [49]
The answer is 45 bc if they sell 46 that gives u the answer
4 0
3 years ago
Simplified form of expression 125 2/3
masha68 [24]

Answer:

377/3

Step-by-step explanation:

In general if we have a fraction ( mixed) as ,

a\dfrac{c}{d}

Then the improper fraction will be ,

<u>Improper</u><u> fraction</u><u> </u><u>:</u><u>-</u><u> </u>

\dfrac{ d\times a + c}{d}

Using this concept we have ,

→ 125 ⅔

→ 125 × 3 + 2 / 3

→ 375 + 2/3

→ 377/3

<h3>Hence the simplified form of the expression is 377/3 .</h3>
3 0
3 years ago
5
atroni [7]

Answer:

I believe the question says "5j + 16 - 12(-9j - 4) - 12j"  I hope I'm correct because I have almost no idea what you typed.

If you did type "5j + 16 - 12(-9j - 4) - 12j" then your answer would be 133j + 52 I believe. You never put how you would like your problem to be solved, so I simplified.

Step-by-step explanation:

Hope this helps.

5 0
3 years ago
2.5% of a population are infected with a certain disease. There is a test for the disease, however the test is not completely ac
Aleks04 [339]

Answer:

P(disease/positivetest) = 0.36116

Step-by-step explanation:

This is a conditional probability exercise.

Let's name the events :

I : ''A person is infected''

NI : ''A person is not infected''

PT : ''The test is positive''

NT : ''The test is negative''

The conditional probability equation is :

Given two events A and B :

P(A/B) = P(A ∩ B) / P(B)

P(B) >0

P(A/B) is the probability of the event A given that the event B happened

P(A ∩ B) is the probability of the event (A ∩ B)

(A ∩ B) is the event where A and B happened at the same time

In the exercise :

P(I)=0.025

P(NI)= 1-P(I)=1-0.025=0.975\\P(NI)=0.975

P(PT/I)=0.904\\P(PT/NI)=0.041

We are looking for P(I/PT) :

P(I/PT)=P(I∩ PT)/ P(PT)

P(PT/I)=0.904

P(PT/I)=P(PT∩ I)/P(I)

0.904=P(PT∩ I)/0.025

P(PT∩ I)=0.904 x 0.025

P(PT∩ I) = 0.0226

P(PT/NI)=0.041

P(PT/NI)=P(PT∩ NI)/P(NI)

0.041=P(PT∩ NI)/0.975

P(PT∩ NI) = 0.041 x 0.975

P(PT∩ NI) = 0.039975

P(PT) = P(PT∩ I)+P(PT∩ NI)

P(PT)= 0.0226 + 0.039975

P(PT) = 0.062575

P(I/PT) = P(PT∩I)/P(PT)

P(I/PT)=\frac{0.0226}{0.062575} \\P(I/PT)=0.36116

8 0
3 years ago
(a⁷ - a⁴) ÷ (a³ + a²)
Tema [17]

Answer:

a^4 - a^3 + a^2 - 2a - (2)/(a + 1)

4 0
3 years ago
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