Solve 2x2 + 20x + 8 = 0 by completing the square.

Probability = number of desired event occurrences/number of events in sample space = 9/36 = 1/4

Probability is the branch of mathematics that deals with numerical descriptions of how likely an event is to occur or how likely it is that a claim is true. The probability of an event is a number between 0 and 1, with 0 signifying impossibility and 1 expressing certainty.

A compound event is made up of two separate events.

Here is a table of probable sums of two die rolls. Die 1 and Die 2 values are listed along the side and top. The figures are roughly near the middle. The sum of Die 1 = 2 and Die 2 = 2 is 4, for example.

          Die 2

Die1    1   2   3   4   5   6

1         2   3   4   5   6   7

2         3   4   5   6   7   8

3         4   5   6   7   8   9

4         5   6   7   8   9   10

5         6   7   8   9   10 11

6         7   8   9   10 11  12

Rolling two dice yields 6 * 6 = 36 possible outcomes, or 36 possible sums. There are 36 occurrences in the sample space.

Looking at the table, a 3 or a 9 happens as the sum 9 times, resulting in 9 of the 36 potential occurrences having a sum of 3 or 9.

Probability = number of desired event occurrences/number of events in sample space = 9/36 = 1/4

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600 is the 80% of the the expected number

Number of people that expected to attend the concert = 750 people

Number of people that attended the concert = 600 people

600 is what percent of the expected number = ( Number of people that attended the concert ÷ Number of people that expected to attend the concert ) × 100

Substitute the values in the equation

600 is what percent of the expected number = (600 / 750) × 100

Divide the terms in bracket first

= 0.8 × 100

Multiply the given terms

= 80%

Hence, 600 is the 80% of the the expected number

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The area that is watered as the sprinkler rotates 90° is 196,250.

What is the area of the circular plot?

The space a circle takes up in a two-dimensional plane is known as the area of the circle. Alternately, the area of the circle is the area included inside the circumference or perimeter of the circle. A = πr², where r is the circle's radius, is the formula for calculating a circle's surface area.

Here, we have

Diameter = 1000ft

Radius = 500

Then, we apply the area of a circle and get

= (90/360)× π×(500)²

= 62,500 × π

= 196,250

Hence, the area that is watered as the sprinkler rotates 90° is 196,250.

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The equivalent rational expression with the same denominator as given will be 8(c - 8)/[(c - 3)(5c - 9)(c - 8)] and  2c(c - 3)/[(c - 3)(5c - 9)(c - 8)].

A mixture of variables, numbers, addition, subtraction, multiplication, and division are called expressions.

An expression is a mathematical proof of the equality of two mathematical expressions.

As per the given expression,

8/(5c² - 6c - 27) , 2c/(5c² - 31c - 72)

Now, take the first denominator,

5c² - 6c - 27 = 5c² - 15c + 9c - 27

⇒ 5c(c - 3) - 9(c - 3)

⇒ (c - 3)(5c - 9)

Take the second denominator

5c² - 31c - 72 = 5c² - 40c + 9c - 72

⇒ 5c(c - 8) + 9(c - 8)

⇒ (c - 8)(5c + 9)

Therefore, the expression converts as,

8/[(c - 3)(5c - 9)] , 2c/[(c - 8)(5c + 9)]

8/[(c - 3)(5c - 9)] = 8(c - 8)/[(c - 3)(5c - 9)(c - 8)]

2c/[(c - 8)(5c + 9)] = 2c(c - 3)/[(c - 3)(5c - 9)(c - 8)]

The denomiantor of both expression are same.

Hence "The equivalent rational expression with the same denominator as given will be 8(c - 8)/[(c - 3)(5c - 9)(c - 8)] and  2c(c - 3)/[(c - 3)(5c - 9)(c - 8)]".

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The structured question below,

Answer:

Mediterranean Paradise has 30 fewer deluxe staterooms than three times the number of deluxe staterooms on the

Pacific Paradise.

Step-by-step explanation:

The measure of the angle for the given trigonometric function is 30°.

Given that, [tex]sin^{-1}(0.5)[/tex].

Trigonometric angles are the angles in a right-angled triangle using which different trigonometric functions can be represented. Some standard angles used in trigonometry are 0º, 30º, 45º, 60º, 90º.

Trigonometry angle can be expressed in terms of trigonometric ratios as,

θ = [tex]sin^{-1[/tex] (Perpendicular/Hypotenuse)

θ =[tex]sin^{-1[/tex] (0.5)

= [tex]sin^{-1[/tex] (1/2)

= 30°

Therefore, the measure of the angle for the given trigonometric function is 30°.

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Step-by-step explanation:

there is no interest and such involved. it is a straight forward calculation to allow the lender to accumulate enough funds (= the ESCROW account as part of the mortgage account structure) to be able to pay the taxes once a year on behalf of the owners.

so, the tax is $1.50 for every $100 of the assessed value of the house.

how many $100 units are in that value ?

180,000 / 100 = 1,800 units.

that means the tax for that house is

1800 × 1.5 = $2,700

in order for the lender to accumulate $2,700 in the ESCROW account in a year (= 12 months), the monthly contribution has to be

2700 / 12 = $225.00

The coordinates  of the point that is one half the distance between A and B is (5/2, 11/2)

The point with the distance that is one half the distance between A and B is the midpoint of A and B.

The coordinate of the midpoint of a line is the half x values and y values. Thus: Xm = (X1 + X2)/2 and Ym = (Y1 + Y2)/2

where m is the midpoint

Given: A(-1, -2) and B(6, 12)

X1 = -1, Y1 = -2 and X2 = 6, Y2 = 12

Xm = -1+6 /2 = 5/2

Ym = -2+12 = 11/2

Therefore, the coordinates  of the point that is one half the distance between A(-1, -2) and B(6, 12) is (5/2, 11/2)

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Answer:

  y = 2x +2

Step-by-step explanation:

You want the equation of the line through points (-4, -6) and (2, 6).

The slope of the line is given by the formula ...

  m = (y2 -y1)/(x2 -x1)

  m = (6 -(-6))/(2 -(-4)) = 12/6 = 2

The point-slope equation of a line is ...

  y -k = m(x -h) . . . . . line with slope m through point (h, k)

Using the point (2, 6) and the found value of slope, an equation for the line can be written:

  y -6 = 2(x -2) . . . . point-slope equation for the line

Solving this equation for y and simplifying, we get the slope-intercept equation of the line.

  y = 2x -4 +6 . . . . . eliminate parentheses, add 6

  y = 2x +2 . . . . . . . . simplify; slope-intercept equation

Answer:

Step-by-step explanation:

50

Answer:

76%

Step-by-step explanation:

100%-24%=76%

Answer:

[tex]d=-6[/tex]

[tex]a_9=-49[/tex]

Step-by-step explanation:

If the first term of a sequence is [tex]-1[/tex] and the second term is [tex]-7[/tex], then each successive term in the sequence is [tex]6[/tex] less than the previous term. The common difference is [tex]-6[/tex] ( [tex]d=-6[/tex] ).

The formula representing the arithmetic sequence is:

[tex]a_n=-6n+5[/tex]

Therefore, the ninth term in the sequence is:

[tex]a_9=-6(9)+5[/tex]

[tex]a_9=-54+5[/tex]

[tex]a_9=-49[/tex]

Answer:

y=60°, x=60°

Step-by-step explanation:

X=60° Angles in a Equaliteral triangles are all 60°

Alternate angle to get the base angle close to y

Y=60° because of Isoceless angles

1. Dianely's salary can be represented with the following table of values for 5 years as follows:

Year         Salary

1            $40,000

2           $42,500

3           $45,000

4           $47,500

5          $50,000

2. The equation to model Dianely's salary after n years is S = 40,000 + 2,500n.

An equation is a mathematical statement equating two or more mathematical expressions.

Equations use variables, numbers, mathematical operands, and the equation symbol (=).

Dianely's initial salary = $40,000

Salary raise per year = $2,500

Dianely's salary after n years in equation form, S = 40,000 + 2,500n.

Year         Salary

1            $40,000

2           $42,500 (40,000 + 2,500)

3           $45,000 (42,500 + 2,500)

4           $47,500 (45,000 + 2,500)

5          $50,000 ($47,500 + 2,500)

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Answer:

Lee would have $1.30 left.

Step-by-step explanation:

7 x 5 = $35

6 x .25 = $1.50

Altogether, Lee has $36.50 before buying the jacket

$36.50 - 35.20 = $1.30

Answer:

Step-by-step explanation:

You want the result of a division operation performed on numbers written in scientific notation.

In each case, the result number will have a repeating decimal fraction. We show 4 significant figures in the answer. The number of significant figures you need to use will depend on what you're using the answer for. If you are required to match the precision of the numbers here, you will want to use 1 significant figure.

The rules of exponents apply, so the exponent of the result will be the difference of the exponents of numerator and denominator. As always, if the numerator mantissa is smaller than the denominator mantissa, the result will be a fraction, so adjustment of the exponent will be necessary.

  = (5/3)×10^(-10-(-9)) = 1.667×10^-1

  = (1/3.5)×10^(-9-(-9)) = 0.2857×10^0 = 2.857×10^-1

__

Additional comment

Any scientific or graphing calculator and any spreadsheet can accept input in scientific notation and format the output in the same way.

You need to be careful with the way you enter the multiplier. Most calculating platforms accept the E notation shown in the attachment. If you use multiplication (×10^-9, for example), then the denominator number will need to be enclosed in parentheses. The third line of the second attachment shows the result of not using parentheses: the multiplier intended for the denominator instead multiplies the result of the division. (This behavior is required by the Order of Operations.)

If Samuel answers 9 questions wrong, his score will be 55 points, and if he answers x questions wrong his score is:

f(x) = 100 - x*5

We know that there are 100 points available, and each question gives 5 points, then the number of questions is given by the quotient:

100/5 = 20

There are 20 questions.

So, if you answer 9 wrong, then you answer:

20 - 9 = 11  correctly

Then your score is:

11*5 = 55

Your score will be 55 points.

And again, each answer gives 5 points, so if you answer x questions wrong your score will be the linear equation:

f(x) = (20 - x)*5

f(x) = 100 - x*5

Where x is an integer between 0 and 20.

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Answer:

37,

Step-by-step explanation:

standard form for a linear equation means

• all coefficients must be integers, no fractions

• only the constant on the right-hand-side

• all variables on the left-hand-side, sorted

• "x" must not have a negative coefficient

[tex](\stackrel{x_1}{-4}~,~\stackrel{y_1}{1})\hspace{10em} \stackrel{slope}{m} ~=~ 3 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{1}=\stackrel{m}{ 3}(x-\stackrel{x_1}{(-4)}) \implies y -1= 3 (x +4) \\\\\\ y-1=3x+12\implies y=3x+13\implies -3x+y=13\implies \boxed{3x-y=-13}[/tex]

Answer:

x-int=-40

y-int=15

Step-by-step explanation:

we have points 0,15 and -40,0 on the line.

It is as easy as the y-int being 15 and the x-int being -40!

the y-int will always be= (0,#)

the x-int will always be (#,0)

Answer:

[tex]y+17=-2(x-14)[/tex]

Step-by-step explanation:

The equation of the line passing through the point [tex](x_1, y_1)[/tex] and slope [tex]m[/tex] is [tex]y-y_1=m(x-x_1)[/tex].

The correct answer is Option A.

Randomization important because it is used to ensure all treatment groups receive experimental units .

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Answer:

the answer is c. to ensure that all treatment groups are roughly equivalent regarding the variability within the experimental units

Step-by-step explanation:

The amount John will spend on food for each cow per month is approximately 15.08 dollars

John is in charge of feeding the pigs and cows on the farm.

The cow's food costs twice as much as the pig's food.

Let

x = cost of pigs food

y = cost cow's food

Hence,

y = 2x

There are 46 cows and 22 pigs on the farm. John has an $860 budget for food a month.

46y + 22x = 860

Therefore, let's combine the system of equation.

y = 2x

46y + 22x = 860

46(2x) + 22x = 860

92x + 22x = 860

114x = 860

x = 860 / 114

x = 7.5 dollars

y = 2(7.54) = 15.08 dollars

Therefore, the cost of food for each cow is 15.08 dollars

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It is true that when you add an integer to +3, a negative sum or postive sum is possible. An example is 2 + 3 = 5 and -4 + 3 = -1

It should be noted that from the information,we want to prove that addition of +3 to an integer can either be negative or positive.

This will be:

= 2 + 3

= +5

In this case, it gives a positive number.

Also, -4 + 3

= -1

This gives a negative number.

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Answer: 6 lbs per acre

Step-by-step explanation: just divide 36 by 6 and you get 6. To check your answer multiply 6 and 6. Then you get 36 and know your answer is right.

If  a multipack of crisps contains 10 packets. the least and the greatest weights of the multipack is 315, 325.

Range = 31.5≤  x < 32.5

Range = 31.5≤  10 < 32.5

Hence,

Lowest and greatest possible for 32 grams

Lowest possible = 31.5 grams

Greatest possible =32.4 grams

Since multipack of crisps contain is 10 packets hence.

Least weight = 31.5 grams × 10

Least weight =315

Greatest weight = 32.5 grams × 10

Greatest weight = 325

Therefore 315 and 325 are the weight.

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The equation of the line in slope-intercept form is y = -4x/3-6 when the line is parallel to y = -4x/3+11.

According to the question,

We have the following information:

The line is parallel to y = -4/3x + 11 and passes through the point (–6, 2).

Now, we know that the following formula is used to find the equation of the line:

y-y' = m(x-x')

In this case, m is the slope of the line.

m = -4/3

We have the following values:

x' = -6 and y' = 2

Now, we have the following expression:

(y-2) = -4/3(x+6)

y-2 = -4x/3-8

Adding 2 to both sides of the equation:

y = -4x/3-8+2

y = -4x/3-6

Hence, the equation of the line in slope-intercept form is y = -4x/3-6 when the line is parallel to y = -4x/3+11.

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Answer:

100

Step-by-step explanation:

x = 20

x ÷ 2

= 20 ÷ 2

= 10

y = 10

y ( x ÷ 2 )

= 10 x 10

= 100