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attashe74 [19]
3 years ago
6

Do you have any info on adding and dividing fractions?

Mathematics
2 answers:
Gennadij [26K]3 years ago
8 0
When you add fractions, you NEED to have the same denominator.

When you divide fractions, you do NOT need to have the same denominator.

\frac{a}{c} + \frac{b}{c} = \boxed{\bf{\frac{a+b}{c}}}

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c} = \boxed{\bf{\frac{ad}{bc}}}

a, b, c, and d are variables. You can replace them with any number.
Law Incorporation [45]3 years ago
7 0
Adding and dividing fractions:

To add (and subtract) fractions, we need the same denominator. If both fractions that you are adding (or subtracting) do not have the same denominator, you will have to find the least common denominator of both of them.
If the fractions are:
\frac{2}{3} + \frac{1}{2}
3 × 1 = 3                              2 × 1 = 2
3 × 2 = 6                              2 × 2 = 4
                                            2 × 3 = 6
The least common denominator is 6
\frac{2*2}{3*2} + \frac{1*3}{2*3}
\frac{4}{6} +  \frac{3}{6} = \frac{7}{6} or 1\frac{1}{6}

For diving fractions, you do not need common denominators
You can multiply the first fraction by the second fraction's reciprocal.

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Your company gives you a cell phone plan which allows you 600 minutes to talk per month. So far this month, you have used 330 mi
Evgen [1.6K]
The answer is C) 10x + 330 ≤ 600. 
We use the ≤ since you are allowed to use the 600th minute.
When we subtract 330 from both sides, it makes a bit more sense
10x ≤ 270
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3 0
3 years ago
A box contains 4 red marbles, 8 blue marbles, and 2 white marbles. The marbles are selected at random, one at a time, and are no
vlada-n [284]

Answer:

64

Step-by-step explanation:

multiply 4 and 8 and 2 together to get 64

8 0
3 years ago
Read 2 more answers
Amistad deposited $2,163.27 in a savings account that earns 3.9% simple interest. What will Amistad's account balance be in nine
avanturin [10]

Given that Amistad deposited $2,163.27 in a savings account that earns 3.9% simple interest.

That means we need to use Simple interest formula to find the Amistad's account balance in nine months.


Simple interest formula is

A=P(1+RT)

Where P= principal amount = $2163.27

R= rate of interest = 3.9%= 0.039

T= time in years = 9 months = 9/12 years = 0.75


Now plug these values into above formula:

A=2163.27(1+0.039* 0.75)

A=2163.27(1+0.02925)

A=2163.27(1.02925)

A=2226.5456475


Hence Amistad's account balance in nine months will be approx $2226.55

8 0
3 years ago
PLEASE PLEASE PLEASE ​
Scilla [17]

Answer: The first one

6 0
3 years ago
I need help on this hw
Vinil7 [7]
Its 21 because 9+10= 21

7 0
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