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Solve ² - 5x+7=0.​

The original value of the machine is $ 30 , 720 , 000 .

Given : Decay factor = 0.75 per year

           Present value of machine ( after 6 yrs . ) = $ 7500 .

According to ques .

The original value of machine be worth $ x .

After nth yr. the present value of machine will be

( x - 0.75 x ) [ [tex]( 1 - 0.75 ) ^{n-1}[/tex]  ]  .

Therefore , after 6 yrs. the present value of machine will be

( x - 0.75 x )  [ [tex]( 1 - 0.75 ) ^{5}[/tex]  ]  = 7500

0.25 x * ( [tex]0.25 ^{5}[/tex] ) =7500

Hence , x = 30 , 720,000

Therefore , the original value of the machine is $ 30 , 720 , 000 .

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The probability to the nearest hundredth of a percent, the the password starts with a 9 and ends with a 6 is 1%.

A four digit password will have number ranging from 0-9.

There are four spots in total.

The first spot can not be taken by zero, so only 9 options can take the place of first spot.  As the number can not be repeated, the second spot has only options a 0-8. The third spot will eventually have 8 options only. The Fourth spot will have 7 options available to fill the spot.

Hence total number of 4-digit passwords combinations can be calculated by multiplying the options,

= 9 x 9 x 8 x 7

= 10206.

A total of 10206 passwords are possible.

The number of passwords starting from nine and ending with six can be found as,

= 1 x 9 x 8 x 1

= 72

A total of 72 passwords starting from 9 and ending with 6.

The probability that a password chosen is starting from 9 and ending with 6 is,

P(E) = 72/10206

P(E) = 0.007

Probability in percent,

= 0.007 x 100

= 0.7

Rounding it off, we get nearly 1%.

So, the probability is nearly 1%.

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Joy was charged the labor of 11 hours

Joy was charged a total of $1215 from the landscaper for listed parts and labor

He was charged $445 for listed parts

He was charged the rest for labor

The hourly rate for labor is $ 70

Let the number of hours worked by labor be x

so, we can form a linear equation here as 445 + 70x = 1215

Now we have to solve this linear equation

445 + 70x = 1215

70x= 1215 - 445

70x = 770

x = 770/ 70

x = 11

Therefore, 11 hours of labor was needed to complete the job.

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On average, the number of miles the athlete ran per day is; 18/5 or 3.6 miles per day

We are given;

Number of days the athletes ran = 3¹/₂ days = 7/2 days

Total distance ran in the given time = 12³/₅ miles = 63/5 miles

Now, the average distance will simply be given by the expression;

Average Distance = Total Distance/Number of days of running

Now, let us convert the fractions to improper fraction for easy division. Thus, we have;

Number of days the athletes ran = 7/2 days

Total distance ran in the given time = 63/5 miles

Thus;

Average Distance = (63/5)/(7/2)

Average distance = 63/5 * 2/7 = 18/5 = 3.6 miles per day

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A number line plot is a graph that displays the frequency a number occurs in a set of data. Dot plot is another name for a number line plot.

The number line is a one-dimensional graph that can display all of the rational numbers (whole numbers, integers, and rational numbers).

The numbers we use for counting, or enumerating items, are the natural numbers: 1, 2, 3, 4, 5, and so on. We describe them in set notation as {1,2,3,...} where the ellipsis (…) indicates that the numbers continue to infinity. The natural numbers are, of course, also called the counting numbers. Any time we enumerate the members of a team, count the coins in a collection, or tally the trees in a grove, we are using the set of natural numbers. The set of whole numbers is the set of natural numbers plus zero , 0,1,2,3,...

The set of integers adds the opposites of the natural numbers to the set of whole numbers: −3,−2,−1,0,1,2,3,

It is useful to note that the set of integers is made up of three distinct subsets: negative integers, zero, and positive integers. In this sense, the positive integers are just the natural numbers. Another way to think about it is that the natural numbers are a subset of the integers.,−3,−2,−1,negative integers

0,zero1,2,3, positive integers.

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The value of nine plus ten is 19

Mathematical operations are simply known as arithmetic operations used in solving algebraic problems and other mathematical calculations.

These operations include;

In this case, we have;

nine plus ten

This is expressed as;

9 + 10

The sum is 19

Thus, the value of nine plus ten is 19

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the extraneous solution for the equation √ (x + 3) - 1 = x is x = 1 or x = - 2.

We are given an equation:

√ (x + 3) - 1 = x

√ (x + 3) = x + 1

Raise both sides to the power 2, we get that:

x + 3 = x² + 1 + 2 x

x² + 2 x - x + 1 - 3 = 0

x² + x - 2 = 0

x² + 2 x - x - 2 = 0

x ( x + 2) - 1 ( x + 2) = 0

(x - 1)(x + 2) = 0

x = 1 or x = - 2.

Therefore, we get that, the extraneous solution for the equation √ (x + 3) - 1 = x is x = 1 or x = - 2.

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The distance of kite above the ground is 65.33 feet.

Trigonometric ratios for a right angled triangle are from the perspective of a particular non-right angle.

In a right angled triangle, two such angles are there which are not right angled(not of 90 degrees).

The slant side is called hypotenuse.

From the considered angle, the side opposite to it is called perpendicular, and the remaining side will be called base.

From that angle (suppose its measure is θ),

[tex]\sin(\theta) = \dfrac{\text{Length of perpendicular}}{\text{Length of Hypotenuse}}\\\cos(\theta) = \dfrac{\text{Length of Base }}{\text{Length of Hypotenuse}}\\\\\tan(\theta) = \dfrac{\text{Length of perpendicular}}{\text{Length of base}}\\\\\cot(\theta) = \dfrac{\text{Length of base}}{\text{Length of perpendicular}}\\\\\sec(\theta) = \dfrac{\text{Length of Hypotenuse}}{\text{Length of base}}\\\\\csc(\theta) = \dfrac{\text{Length of Hypotenuse}}{\text{Length of perpendicular}}\\[/tex]

We are given that;

Distance = 2.5 feet

Now,

Using this function, you can write an equation for the height of the kite, h:

sin(25°) = h / 150

Solving for h, you get:

h = 150 × sin(25°)

h = 62.83 feet

However, this is not the final answer, because you also need to add Aubrey’s hand height above the ground, which is 2.5 feet. Therefore, the total height of the kite above the ground is:

h + 2.5 = 62.83 + 2.5

h + 2.5 = 65.33 feet

Rounding to the nearest hundredth of a foot, you get:

h + 2.5 = 65.33 feet

Therefore, by trigonometric ratios the answer will be 65.33 feet .

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Answer:

The kite is 65.89 feet above the ground.

Step-by-step explanation:

Answer: The monthly payment assuming that each month he paid the same amount is = 362.5 $

Step-by-step explanation:

Given data,

Johnny bought a used car for  $7,500

He had $4600 and borrowed the rest from his parents.

Johnny 8 months to pay back the money he borrowed

So, we can write ,

Let us assume,   x1 = $7,500  and  x2 = $4600

Based on the given conditions,

we use formula is :

                          x = ( x1 - x2 ) / pay back months

                          x = ( 7,500 - 4,600 ) / 8

we can subtract the values,

we can write,

                    x = 2900/8

                      x = 725/2

                      x = 362.5 $

Therefore,

The monthly payment assuming that each month he paid the same amount is = 362.5 $.

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Answer:

The sides of the triangle are 15 inches and the sides of the square are 15 - 6 = 9 inches

Step-by-step explanation:

It is given that the perimeter of an equilateral triangle is 9 inches more then the perimeter of a square, and side of the triangle is 6 inches longer then the side of the square.

Now,

An equilateral triangle has all 3 sides the same length

Let one side of the triangle be x so the perimeter will be 3x.

Further, if one side of the square is 6 longer than a side of the triangle

then the square has side length x - 6 and perimeter is;

=> 4(x - 6)

=> 4x - 24

Since, the perimeter of the triangle is 9 more than the perimeter of the square we get the equation as;

=> 3x = 4x - 24 + 9

=> x =  15

Therefore,

The sides of the triangle are 15 inches

The sides of the square are 15 - 6 = 9 inches

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The exponent -6⁻⁴ is -(1/6⁴) which simplifies to -(1/1296).

Exponents represent how many times a number is multiplied by itself. Numbers written in exponent form are more compact for a large number of repetitive multiplications.

We know moving an exponent from numerator to denominator or vice versa changes the sign of the exponent.

∴ -6⁻⁴ can be written as -(1/6⁴) which is,

-(1/1296).

Now, simplifying (-6)⁻⁴ which is 1/(-6)⁴,

= (1/1296).

So, their numerical value is the same but they are of different signs as (-6) multiplied 4 times gives a positive number.

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Answer:

4(2)³+A×2²+7(2)-1=7

4×8+4A+14-1=7.

32+14-1-7=-4A..

38=-4A.

A=38/-4.

Answer:

125%

this is the answer in percent form

if we take 140 as the 100%, what is 175 off of it in percentage?

[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 140 & 100\\ 175& x \end{array} \implies \cfrac{140}{175}~~=~~\cfrac{100}{x} \\\\\\ \cfrac{4}{5}=\cfrac{100}{x}\implies 4x=500\implies x=\cfrac{500}{4}\implies x=125[/tex]

Answer:

C=h+k+p

Step-by-step explanation:

You just add all of the variables and it equals your total cost. if it was by hour the equation would be slightly different

Answer:

10 pencils

Step-by-step explanation:

16-x = 36-3x

16-36 = -3x+

thus x = 10

An explicit formula for Mallory's run will be 15 + 5x.

Mathematical expression is the combination of numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also be used to denote the logical syntax's operation order and other properties.

Given that on June 1st, she starts by running for 15 minutes, and every day after that she adds 5 minutes to her run.

Equation = 15 + 5x, where x is the number of days.

Therefore, the explicit formula for Mallory's run will be 15 + 5x.

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in the given figure the value of x is 45°.

In Plane Geometry, a figure which is formed by two rays or lines that shares a common endpoint is called an angle and corner whether constituting a projecting part or a partially enclosed space.

Given:

<PQR= x+7

<SQR=x+3

<PQR+<SQR=<PQS=100°

According to given question we have

<PQR+<SQR=<PQS

Put the value we get

x+7+x+3=100

Compare like terms we get

2x+10=100

Substract 10 from both sides we get,

2x=90

Divide 2 on both sides we get,

x=45°

Therefore, in the given figure the value of x is 45°.

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Answer:x=21

Step-by-step explanation:

10/14=15/x

5/7=15x^-1

(5/7)/15=ans

ans=x^-1

ans^-1=21

Answer: x=21

Step-by-step explanation:

[tex]\frac{10}{14} =\frac{15}{x}[/tex]

Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 14x, the least common multiple of 14,x.

x×10=14×15

Multiply 14 and 15 to get 210.

x×10=210

Divide both sides by 10.

x=

10

210

​

Divide 210 by 10 to get 21.

x=21

Answer: Solution is t = 905/8

Step-by-step explanation:

Given data,

         ttt:-\dfrac{7}{4}=\dfrac{2}{5}t− 47 = 52​ t

We can write,

              - 7/4 = (2/5) t - 47

Rearrange variables to the left side of the equation

               - (2/5) t = - 47 + 7/4

Find common denominator and write the numerators above common denominator

                 - (2/5) t = ( -188 + 7 ) / 4

calculate the sum or difference

                   - (2/5) t = -181/4

Divide both sides of the equation by the coefficient of variable

                      t = (-181/4) x (-5/2)

Determining the sign for multiplication or division

                       t = 181/4 x 5/2

Write as a single fraction

                          t = ( 181 x 5 ) / ( 4 x 2 )

Calculate the product or quotient

                          t =  (905/8)

Therefore,   t = 905/8

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Answer:

Step-by-step explanation:

 The system of equations does not have one solution because the lines will never intersect.

Answer: 135°

Step-by-step explanation:

Since π = 180°

(3 × π)/ 4

Substitute 180° for π

= (3 × 180)/4

Simplify

= 540/4

= 135°

Answer:

The number is 15

Step-by-step explanation:

x = a number

4/3 x - 12 = 8

Rearrange the equation so that the integers are on one side - in the format Ax = B

4/3 x - 12 = 8

4/3 x = 8 + 12

4/3 x = 20

Simplify the equation - in the format x = A - then solve for x

4/3 x = 20

4 x = 20 * 3

4 x = 60

x = 60 / 4

x = 15

[tex] \large \bf \implies{A\: number\: is\:15}[/tex]

A number is x

then we have [tex]\frac{4}{3}[/tex]x - 12 = 8

[tex] \bf \longrightarrow \frac{4}{3}x - 12 = 8 \\ \\ \bf \longrightarrow \frac{4}{3}x = 8 + 12 \\ \\ \bf \longrightarrow \frac{4}{3}x = 20 \\ \\ \bf \longrightarrow 4x = 20 \times 3 \\ \\ \bf \longrightarrow4x = 60 \\ \\ \bf \longrightarrow x = \frac{ \cancel{60}}{ \cancel{4} } \\ \\ \bf \longrightarrow \: x = 15[/tex]

'Four thirds of the number is [tex]\frac{4}{3}x[/tex] then decreased by 12 is [tex]\frac{4}{3}x - 12[/tex] then gives the result 8. That is [tex]\bf\frac{4}{3}x - 12 = 8[/tex]'

Brianna would receive 28 votes from students.

So, a recurring decimal at the number "2" is "0.6222.

Let x = 0.62222....

Subtract 10x from 100x as follows:

Therefore, Brianna would receive 28 votes from students.

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The correct question is given below:
Brianna asked 45 students if they would vote for her to be student council president. She used her calculator to compare the number of students who said yes with the total number of students. Her calculator showed the result as 0.6222...

1. Write this number as a fraction (Steps)

2. How many students said they would vote for Brianna?

The slope-intercept form of the line passing through the two points is

y = 4x + 33

Slope-intercept equation is one of the special forms of the linear equation.

To find the slope,

The point-slope formula is used to find the slope

y₂-y₁ = m (x₂-x₁)

where (x₁,y₁) and (x₂,y₂) are (-9,-3) and (-7,5), Then

5 - (-3) = m [-7 - (-9)]

5 + 3 = m (-7+9)

8 = m(2)

m = 8/2

m = 4

Therefore, the slope of the line passing through two points is 4

To find the intercept,

We can use the slope intercept formula to find the intercept

y = mx + b

where (x,y) be (-9,-3) abd m = 4 , Then

-3 = 4(-9) + b

-3 = -36 = +b

b = 36-3

b = 33

Therefore, the intercept of the line passing through two points is 33

Thus, the slope intercept form of the line passing through the two points

(-9, -3) and (-7, 5) can be written as

y = 4x + 33

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