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2 years ago

Simplify the expression below: 2x-3(y – 2x)

Mathematics

2 answers:

aleksley [76]2 years ago

6 0

Answer:

8x + 3y

Step-by-step explanation:

2x-3(y-2x)

2x-3y+6x

8x +3y

ad-work [718]2 years ago

4 0

Answer:

4x-3y

Step-by-step explanation:

=> 2x-3(y-2x)

=> 2x-3y+2x

=> 4x-3y

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Last week Malia spent $13,000 on advertising. This week, she plans to spend three times as much. Next week, she wants to spend 6

PSYCHO15rus [73]

Answer:

31200 dollars

Step-by-step explanation:

you multiply 13 by 4, because its last week and this week, then find 60 percent of that. Proportion: x/52000=60/100. When solved, it is $31200

4 0

2 years ago

The R.R. Bowker Company of New York collects data on annual subscription rates to periodicals. Results are published in Library

Igoryamba

Answer:

90%

Step-by-step explanation:

Let's call the percentage of students that read Time magazine by P(T), and the percentage of students that read U.S News and World Report by P(U). So, we have that:

P(T) = 0.63

P(U) = 0.51

P(T and U) = 0.24

To find the percentage of students that read either the Time magazine or the U.S.News and World Report magazine (that is, P(T or U)), we can use this formula:

P(T or U) = P(T) + P(U) - P(T and U)

So, we have that:

P(T or U) = 0.63 + 0.51 - 0.24 = 0.90

So the probability is 90%

6 0

2 years ago

Which equation represents the line that passes through the points (6, –3) and (–4, –9)?

Delvig [45]

(6,-3)(-4,-9)
slope(m) = (-9 -(- 3) / (-4 - 6) = (-9 + 3) / -10 = -6/-10 = 3/5

y - y1 = m(x - x1)
slope(m) = 3/5
(6,-3)....x1 = 6 and y1 = -3
now we sub
y - (-3) = 3/5(x - 6) =
y + 3 = 3/5(x - 6) <==

8 0

2 years ago

Read 2 more answers

3(x+y)=y, if (x,y) is a solution to the equation above and y cannot equal to zero what is the ratio x/y

irakobra [83]

*Given
3(x+y)=y
y is not equal to zero

*Solution

1. The given equation is 3(x+y) = y and we are tasked to find the ratio between x and y. Distributing 3 to the terms in the parenthesis,

3(x+y) = y
    3x + 3y = y

Transposing 3y to the right side OR subtracting 3y from both the left-hand side and the right-hand side of the equation would give

   3x = -2y

Dividing both sides of the equation by 3,

   x = (-2/3)y

Dividing both sides of the equation by y,

x/y = -2/3

Therefore, the ratio x/y has a value of -2/3 provided that y is not equal to zero.

6 0

2 years ago

A writer makes on average one typographical error every page. The writer has landed a 3-page article in an important magazine. I

marysya [2.9K]

Answer:

The probability that the reporter made no typographical errors for the 3-page article is 5%.

Step-by-step explanation:

Let X = number of typographical errors made by the writer.

The average umber of mistakes mad by the writer every page is, E (X) = 1.

The random variable X is defined as finite number of occurrence of a certain activity in a fixed interval of time.

A Poisson distribution is used to describe the distribution of occurrences in a certain interval.

Thus, the random variable X follows a Poisson distribution.

It is provided that the writer has landed a 3-page article in an important magazine.

Then the average number of mistakes in the 3 pages is:

λ = 3 × E (X) = 3 × 1 = 3.

The probability mass function of the Poisson random variable X is:

$P(X=x)=\frac{e^{-3}3^{x}}{x!};\ x=0,1,2,3...$

Compute the probability that the writer makes no mistake in a 3-page article as follows:

$P(X=0)=\frac{e^{-3}3^{0}}{0!}=\frac{0.0498\times 1}{1}=0.0498\approx 0.05$

The probability that the writer makes no mistake in a 3-page article is 0.05.

Thus, the probability that the reporter made no typographical errors for the 3-page article is 5%.

8 0

2 years ago

Read 2 more answers