The “communication revolution” has given us prepaid phone calling cards. These cards are used to make long distance phone calls from any phone. In a recent year the industry posted sales of $500.000. Three years later the sales figure had risen to $200,000,000. What is the increase in sales over the three-year period

The algebraic expression in simplest terms is 200 · x² - 79 · x + 14 = 0.

In this problem we have a sum of products of binomials as algebraic expression and we must reduce to its simplest terms by using algebra properties, that is, using these properties until a polynomial is found:

(- 10 · x + 2) + (- 9 · x + 8) · (- 10 · x + 2) + (- 9 · x + 8) · (- 10 · x + 2) + (- 9 · x + 8)

(- 10 · x + 2) + 2 · (- 9 · x + 8) · (- 10 · x + 2) + (- 9 · x + 8)

(- 10 · x + 2) · [1 + 2 · (- 10 · x + 2)] + (- 9 · x + 8)

(- 10 · x + 2) · (1 - 20 · x + 4) + (- 9 · x + 8)

(- 10 · x + 2) · (3 - 20 · x) + (- 9 · x + 8)

3 · (- 10 · x + 2)  + (- 20 · x) · (- 10 · x + 2) + (- 9 · x + 8)

- 30 · x + 6 + 200 · x² - 40 · x - 9 · x + 8

200 · x² - 79 · x + 14

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Answer:

47002 :)

is how you write 47 thousand +2

Answer:

well done...I hope it's helpful

According to the Centers for Disease Control and Prevention (CDC), the average shower lasts 8 minutes. If you like to linger in the shower for longer than 15 minutes, you might want to rethink your hygiene routine.

According to board-certified dermatologist Dr. Edidiong Kaminska, MD, the recommended maximum shower time is about 5 to 10 minutes. This is enough time to cleanse and hydrate the skin without overdoing it. “Our skin needs water, just like our bodies, but if we over- or under-do it, then it may have consequences,” she adds.

And if you have dry skin or eczema, Dr. Anna Guanche, MD, FAAD, says shorter, lukewarm showers are recommended. Moreover, the Baylor College of Medicine says it’s especially important to avoid hot showers in the wintery months since the heat can damage the surface of the skin, which can lead to inflammation and increase symptoms of eczema.

Side effects of long showers

While a long, hot shower might seem like the best way to pamper your body, over-showering may dehydrate the skin. “The purpose of showering is to hydrate and cleanse the skin, but warm or hot showering for prolonged periods strips away natural oils of the skin and opens up our pores and allows moisture to escape,” Kaminska says.

To keep moisture in, she usually recommends applying a body moisturizer after showering to the skin since it allows the water (hydration) to stay in the skin and not escape.

Margo works 23 hour per week to earn approximately $300 per week .

It is given that Margo earns $13.50 per hour .

Using unitary method , we get

To get his weekly financial gain, we have a tendency to multiply his hourly wage by the quantity of hours he worked.

Pay = hourly rate × variety of hours worked

300 = 13.50 × number of hours worked

number of hours worked = 300 /13.50

                                           = 22.22

On rounding off , we get the hour = 23 hours

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Answer:

3rd option

Step-by-step explanation:

using the sine and cosine ratios for the 60° angle in the right triangle and the exact values.

cos60° = [tex]\frac{1}{2}[/tex] and sin60° = [tex]\frac{\sqrt{3} }{2}[/tex] , then

cos60° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{x}{12}[/tex] = [tex]\frac{1}{2}[/tex] ( cross- multiply )

2x = 12 ( divide both sides by 2 )

x = 6

and

sin60° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{y}{12}[/tex] = [tex]\frac{\sqrt{3} }{2}[/tex] ( cross- multiply )

2y = 12[tex]\sqrt{3}[/tex] ( divide both sides by 2 )

y = 6[tex]\sqrt{3}[/tex]

-9, -10/32, 13/16, 79/8]

Step-by-step explanation:

use ur brain

Length of AC is 54 units.

The midpoint of a line is a point that bisects the line into equal parts. It is equidistant from both end points of the line.

As B is the midpoint of AC,

AB = BC

∴ 4x - 5 = 11 + 2x

∴ 4x - 2x = 11 + 5

∴ 2x = 16

∴ x = 8.

Now, AC = AB + BC

∴ AC = 4x - 5 + 11 + 2x

Substituting the value of x,

∴ AC = 4(8) - 5 + 11 + 2(8)

∴ AC = 54 units

Thus, the length of AC is 54 units.

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Answer:

13/15

Step-by-step explanation:

If we give all of these fractions a common denominator, this problem will be much easier. We see that a common denominator can be 15.

We can take 1/3 and multiply both the numerator and denominator by 5, getting 5/15. 7/15 already has a denominator of 15. Now if we multiply the numerator and denominator by 3, we get 9/15. Then we have 11/15.

Now the pattern is 5/15, 7/15, 9/15, 11/15. The numerator increases by 2 each time, so the next fraction should be 13/15.

Answer:

x=2.5

Step-by-step explanation:

R = 4x − 9y

We know that R=1 and y=1 so we can substitute that in

1=4x-9

Then solve as a normal algebraic equation

add 9 to both sides

10=4x

divide both sides by 4

2.5=x

Answer: Slope: 3/2

Step-by-step explanation:

Coordinates: (1, -3), (3, 0)

Slope formula: m=(y2-y1)/(x2-x1)

m=(0-(-3))/(3-1)

m=(0+3)/2

m=3/2 ==> Slope: 3/2

    The numbers that are given:

-0.5-0.25-0.125- . . . . . .

 They are part of an infinite series

 A series is the summation of a set of numbers or sequences.

      A sequence is an order of elements that are governed by a pattern, that is, it has variations between each element that remain constant and allow us to determine values before or after the known elements.

 A sequence maintains an order, and this numerical order can be finite or infinite, in the given case we have the following list:

-0.5-0.25-0.125- . . . . . .

If we analyze the variation between each term we have the form:

(-1/2ⁿ)

(-1/2ⁿ)

  In this series we have the initial value of the same, but we do not know the final value, although we know its behavior, we can say that this series has no end, it is an infinite serie.

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Answer:

If it is [tex]6(5)^2[/tex] then the answer is 150

Step-by-step explanation:

So, follow PEMDAS
Parenthesis

Exponent

Multiplication

Division

Addition

Subtraction

First square 5 because there is an exponent [tex]6(5)^2 = 6(25)[/tex]

Next multiply 6 times 25 and you get 150!

Answer:

d) 155

Step-by-step explanation:

The value of x is,

→ x = 5

Now the expression is,

→ 6x² + x

Let's solve the expression,

→ 6x² + x

→ 6(5)² + 5

→ 6(25) + 5

→ 150 + 5

→ 155

Hence, the answer is 155.

No, If y² varies directly with x², it does not that mean y must vary directly with x

Let's say y² =  16 and x² =  4

Now if y²  =  16

Then y = 4 or -4  and same for x = 2 or -2

As the square root can be either negative or positive, if y² varies directly with x², it does not that mean y must vary directly with x .

To solve linear equations, utilize the steps that are provided below.

Lets take an example of solve z for 7z – (3z – 4) = 12

Here is no multiplication or division, so this will be easy to solve

⇒ 7z – (3z – 4) = 12

⇒ 7z – 3z + 4 = 12

⇒ 4z = 12 – 4

⇒ 4z = 8

⇒ z = 8/4

⇒ z = 2

See, that was so simple, using the mentioned methods, every linear equation can be solved easily.

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Answer:

11 people

Step-by-step explanation:

14-8+5

6+5

11

The absolute inequality will be x ≥ | 8.9 ± 0.15 |mm and the compound inequality will be x > 8.75, x< 9.05.

Inequality is the relationship between two expressions that are not equal, employing a sign such as ≠ “not equal to,” > “greater than,” or < “less than.”.

Given that the length is 8.9 mm with a tolerance of 0.15mm.

The absolute inequality will be written as below:-

x ≥ | 8.9 ± 0.15 |mm

The compound inequality will be written as:-

x  > 8.75,

x < 9.05.

Therefore, the absolute inequality will be x ≥ | 8.9 ± 0.15 |mm and the compound inequality will be x > 8.75, x< 9.05.

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Answer:

3760/4000(2 tons=4000pounds)

$0.94 is the answer

The number of apples in the 12th bag is 9.

There are 12 bags of apples on the market stalls.

The mean number of apples in each bag is 8.

Therefore, the number of apples in the 12th bag can be calculated as follows:

mean = ∑fx / ∑f

Hence,

let the number of apples in the 12th bag = a

mean = 6 × 1 + 7 × 4 + 8 × 2 + 9 × 3 + 10 × 1 + x × 1/ 1 + 4 + 2 + 3 + 1 + 1

mean = 6 + 28 + 16 + 27 + 10 + x / 12

mean = 87 + x / 12

8 = 87 + x / 12

cross multiply

96 = 87 + x

x = 96 - 87

x = 9

Hence, the number of apples in the 12th bag is 9.

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Answer:

10 to the 5th power times 9 to the 2nd power over 6 to the 4th power

Answer:

About 1 and 1/4 chapters per day.

Step-by-step explanation:

There are 11 chapters, and eight days to read them. So we divide 11 by 8. 11/8 = 1.375, which is approximately 1 and 1/4.

Answer:

Step-by-step explanation:

Solution for Point C is located on AB such that the ratio of AC : CB is 3:2. ... A: Here point B lies on the line AC with coordinates A(-3,4) and C(2,-6), ...

Answer:

x=1

Step-by-step explanation:

Ok, this is a two step equation, so the first step you will do is get the regular numbers (-4 and -3) on one side of the equation, like this:

3/2x-4=1/2x-3

       +4        +4

3/2x=1/2x+1

Next, you need to get the variables on one side of the equation, so you will minus 1/2x like this.

3/2x=1/2x+1

-1/2x -1/2x

2/2x=1

Simplify

x=1

Answer:

x = 1

Step-by-step explanation:

[tex]\frac{3}{2} x-4 = \frac{1}{2} x-3[/tex]

[tex]x - 4 = -3[/tex]

x = 1

According to the question, the Fibonacci series is a series of sequence of numbers. It follows one standard property which states that every third term in the series is the addition of first term and second term.

Now, the first ten terms of the Fibonacci sequence is as follows:

Fibonacci Series = [tex]{1,1,2,3,5,8,13,21,34,55}[/tex]

The sum of the first ten number of the Fibonacci series is as follows:

Sum = [tex]1+1+2+3+5+8+13+21+34+55 = 143[/tex]

As per question, divide the calculated sum by eleven. Therefore, it can be written as:

Required Division = [tex]\frac{143}{11} = 13[/tex]

Hence, the solution for the given series is [tex]13[/tex].

What is a Fibonacci series?

Fibonacci series is an infinite series of sequences of numbers. The important property of this series is, every third term is the addition of the first and second term. In this, the first term either starts with zero or one.

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Answer:y/5=5/6

Step-by-step explanation:based on given conditons

Answer:

what

Step-by-step explanation:

what scale factor did you find and is there a photo of the rectangle?

Answer: try 1 or 0

Step-by-step explanation:

Answer: 8

Step-by-step explanation:

(-8)= 8