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zavuch27 [327]
3 years ago
7

A DVD box set includes 3 thriller movies and 2 comidies. Use t to represent the cost of each thriller and c to represent the cos

t of each comidy. Write and simplify an expression that represents the total cost of 6 boxes.
Mathematics
1 answer:
suter [353]3 years ago
3 0

Answer:

The expression representing the Total cost of 6 boxes is 6(3t + 2c).

The Simplified expression representing the Total cost of 6 boxes is 18t + 12c.

Step-by-step explanation:

Given:

Number of thriller movies = 3

Number of Comedy movies = 2

Let the cost of thriller movie be t

Also Let the cost of comedy movie be c

Total Number of boxes = 6

Now, given a DVD box set includes 3 thriller movies and 2 comedies.

Cost of Each box = 3t + 2c

We need to find the total cost of 6 boxes

Total Cost of 6 boxes is = 6(3t + 2c)

Hence the expression representing the Total cost of 6 boxes is 6(3t + 2c).

Simplifying the above expression we get;

Total Cost of 6 boxes is = 6(3t + 2c)= 6\times3t+6\times2c=18t+12c

Hence the Simplified expression representing the Total cost of 6 boxes is 18t + 12c.

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(3-4i)(6i+7)-(2-3i)
Sergeu [11.5K]

Answer:

43-7i

Step-by-step explanation:

We are given the expression:

\displaystyle \large{(3 - 4i)(6i + 7) - (2 - 3i)}

First, expand 3-4i in 6i+7. To expand binomial with binomial, first we expand 3 in 6i+7 then expand -4i in 6i+7.

\displaystyle \large{[(3 \cdot 6i) + (3 \cdot 7) + ( - 4i \cdot 6i) + ( - 4i \cdot 7)]- (2 - 3i)}  \\  \displaystyle \large{[18i + 21  - 24 {i}^{2}  - 28i]- (2 - 3i)}

Now combine like terms.

\displaystyle \large{[ - 10i+ 21  - 24 {i}^{2} ]- (2 - 3i)}

<u>I</u><u>m</u><u>a</u><u>g</u><u>i</u><u>n</u><u>a</u><u>r</u><u>y</u><u> </u><u>U</u><u>n</u><u>i</u><u>t</u>

\displaystyle \large{i =   \sqrt{ - 1} } \\ \displaystyle \large{ {i}^{2}  =   - 1 }

Therefore:-

\displaystyle \large{[ - 10i+ 21  - 24  ( - 1) ]- (2 - 3i)}  \\   \displaystyle \large{[ - 10i+ 21   + 24]- (2 - 3i)}  \\   \displaystyle \large{[ - 10i+ 45]- (2 - 3i)}

Then expand negative sign in 2-3i; remember that negative times negative is positive and negative times positive is negative.

\displaystyle \large{- 10i+ 45 -  (2 - 3i)}  \\   \displaystyle \large{- 10i+ 45 -  2 + 3i}

Combine like terms.

\displaystyle \large{43 - 7i}

5 0
2 years ago
Which measure of central tendency best describes this situation: the numbers of apples in 2-lb bags?
katrin [286]

Which measure of central tendency best describes this situation:

The number of apples in 2-lb bags?

Solution: The best measure of central tendency to describe the numbers of apples in 2-lb bags is mean. Because the variable under consideration is numeric and probably we would not see outliers in 2-lb bags.

Mean is the defined as the sum of observations divided by the number of observation. The mean takes into account all the observation of the data. Mean is most preferable when the data is numeric and there are no outliers in the data.

Therefore, in the given situation, where we have number of apples in 2-lb bags, the mean will be best to use.

4 0
2 years ago
An animal shelter wants their ratio of dogs to cats to be 3:2. If the animal shelter has 78 dogs, how many cats should they have
OleMash [197]
The simplest way to do this is to set up equivalent fractions. So, you'd do:

\frac{3}{2} = \frac{78}{x} and then solve for x. 

x=52
4 0
3 years ago
quizlet "it is closed under addition and multiplication but not closed under subtraction or division."
deff fn [24]

Rational numbers are closed under addition ,multiplication but not closed under division

Rational number

Closure property

assume two rational numbers say x and y. the results  of addition and multiplication operations give a rational number we can say that rational number are closed under addition and multiplication . For example

rational number are not closed under division as  1 and 0 are rational number  but 1/0 is not defined but it is closed under addition  and multiplication

that is 1+0 = 1 closed under addition

          1*0 =0 closed under multiplication

but 1/0  is not defined so it is not closed under division

Hence Rational numbers are closed under addition ,multiplication but not closed under division

learn more of closure property here

brainly.com/question/28220649

#SPJ4

4 0
7 months ago
Elena has some bottles of water that each holds 17 fluids ounces.
stiks02 [169]

Answer:

W=17

Step-by-step explanation:

6 0
2 years ago
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