please help square root math

Answer:

The square of a negative number is a positive number as 2 negatives cancel when multiplied.

In this case the negative sign stays as is because it is not affected by a square.

Answer:

probability of lasting longer = 1.7%

Step-by-step explanation:

We are given:

x' = 14 years

μ = 12.3 years

s = 0.8 years

Thus, let's use the formula for the Z-score value which is;

z = (x' - μ)/s

Thus;

z = (14 - 12.3)/0.8

z = 2.125

From the z-distribution table attached, the p-value is ;

P(x' > 2.125) = 1 - 0.983 = 0.017 = 1.7%

Thus,probability of lasting longer = 1.7%

Answer:

The probability that a skid of 50 DVD players will contain at least 3 defective units is 0.9487.

Step-by-step explanation:

We are given that Avery and Bradly work at a large electronics manufacturer that produces DVD players. The defective rate on the assembly line has gone up 12% and a skid of 50 DVD players has been selected by the manager.

Let X = Number of defective units of DVD players

The above situation can be represented through the binomial distribution;

[tex]P(X = r) = \binom{n}{r}\times p^{2} \times (1-p)^{n-r}; x= 0,1,2,3,....[/tex]

where, n = number of samples (trials) taken = 50 DVD players

            r = number of success = at least 3 defective units

           p = probability of success which in our question is the probability

                 of defective rate, i.e; p = 12%

So, X ~ Binom(n = 50, p = 0.12)

Now, the probability that a skid of 50 DVD players will contain at least 3 defective units is given by = P(X [tex]\geq[/tex] 3)

P(X [tex]\geq[/tex] 3) = 1 - P(X = 0) - P(X = 1) - P(X = 2)

= [tex]1 - [ \binom{50}{0}\times 0.12^{0} \times (1-0.12)^{50-0}]-[ \binom{50}{1}\times 0.12^{1} \times (1-0.12)^{50-1}]-[ \binom{50}{2}\times 0.12^{2} \times (1-0.12)^{50-2}][/tex]

= [tex]1 - [ 1 \times 1 \times 0.88^{50}]-[50 \times 0.12^{1} \times 0.88^{49}]-[ 1225 \times 0.12^{2} \times 0.88^{48}][/tex]

= 0.9487

Hence, the probability that a skid of 50 DVD players will contain at least 3 defective units is 0.9487.

When there is a linear relationship is observed between the variables, we use  linear regression predict the relationship between them.

Also, we predict the values for dependent variable by modelling a linear model that best fits the data by drawing a line Y=a+bX, where X is the explanatory variable and Y is the dependent variable.

In other words: The line of best fit is a line through a scatter plot of data points that best describes the relationship between them.

That's why the  regression line referred to as the line of best fit.

Answer:

64,186,300

Step-by-step explanation:

Six-four million - 64 million.

One hundred eighty six thousand - 186,000

You won't have space for the zeros, so you remove them.

And last, three hundred - 300.

So, now combine all of the numbers.

Your answer is 64,180,300.

Hope it helps!

Answer:

  $9918.30

Step-by-step explanation:

The total tax is ...

  6.2% × $128,400 + 1.45% × $135,000 = $7960.80 +1957.50

  = $9,918.30

Answer:

-8

Step-by-step explanation:

Both the numbers are negative so you add them together and keep the negative sign

Answer:

-8

Step-by-step explanation:

when negative and positive meet, the negative dominates the positive thereby making it negative.

-5 + (-3)

-5 - 3

-8

Answer:

Step-by-step explanation:

Given the dataset 147, 154, 156, 161, 162,

Mean is the sum of the dataset divided by the total number of dataset.

a) Mean = [tex]\sum Xi/N[/tex]

[tex]\overline x = \dfrac{147+154+156+161+162}{5}\\ \\\overline x = \dfrac{780}{5}\\ \\\overline x= 156[/tex]

b) The formula for calculating the deviation from the mean for each value is expressed as [tex]Xi - \overline X[/tex] where;

Xi is value of each item

xbar is the mean = 156

Mean deviation of 147 = 147-156 = -9

Mean deviation of 154 = 154-156 = -2

Mean deviation of 156 = 156-156 = 0

Mean deviation of 161 = 161-156 = 5

Mean deviation of 162 = 162-156 = 6

c) Sum of the deviations [tex]\sum Xi - \overline X[/tex] = (-9-2+0+5+6)

[tex]\sum Xi - \overline X[/tex] = -11+11

[tex]\sum Xi - \overline X[/tex] = 0

Hence the sum of deviation from the mean is 0

Answer:

1. Estimate the product.

2. Multiply to find the product. Multiply the decimals as if they were whole numbers. Ignore the decimal point.

3. Compare your estimate with your product to verify that your answer makes sense.

Answer:

The dimensions of the park is 18yd by 18yd

Step-by-step explanation:

A square-shaped park has an area of 324 yd.

A square is composed of equal length dimensions so if the area is 324 yd² ,the dimensions or length if one side of the square will be the root of 324 yd².

Length= √324

Length= 18 yd

Dimensions of the park is 18 yd by 18 yd

The dimensions of the park is 18yd by 18yd

Given that,

Based on the above information, the calculation is as follows:

 [tex]Length= \sqrt 324[/tex]

= 18 yd

Therefore, Dimensions of the park is 18 yd by 18 yd

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This question is incomplete, the complete question is;

A sample of size 86 will be drawn from a population with mean 90 and standard deviation 24. Use the TI-84 calculator Part 1 of 2

Find the probability that x will be more than 89. Round the answer to at least four decimal places. The probability that will be more than 89 is Part 2 of 2 Find the 60 percentile of x. Round the answer to two decimal places. The 60 percentile is

.

Answer:

part 1) the probability that x will be more than 89 is 0.6517

part 2) the 60 percentile of x is 90.65

Step-by-step explanation:

Given that;

u = 90, α = 24, n = 86

Part 1 says Find the probability that x will be more than 89

p ( x > 89 ) = p (( x - u)/α√n > (89-90)/24/√86 ))

= p ( z > - 0.39 ) = 1 - p (z ≤ - 0.39  )

from z table, 0.39 → 0.3483

= 1 - 0.3483 = 0.6517

∴ the probability that x will be more than 89 is 0.6517

part 2 says  Find the 60 percentile of x

p( Z < z ) = 0.60

now from the z-table, p(Z < 0.25 ) = 0.60

and we that  x = u + z(α/√n)

x = 90 + 0.25( 24 / √ 86

x = 90.64699 ≈ 90.65

∴  the 60 percentile of x is 90.65

Answer:

That ratio : 21 : 5

21 : 5 -> (21/21) : (5/21)

5/21 = 0.2 by rounding by tenth

Step-by-step explanation:

Answer:

5,608

Step-by-step explanation:

The total monthly pay of Karen is given by the equation A = $ 5,608

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the total monthly pay of Karen be = A

Now , the equation will be

Let the annual pay of Karen be B = $ 67.3 K

1 K = 1000

The value of B = 67.3 x 1000

The value of B = $ 67300

So , annual pay of Karen B = $ 67300

Now , the monthly pay of Karen = annual pay of Karen / 12

Substituting the values in the equation , we get

The monthly pay of Karen A = $ 67300 / 12

The monthly pay of Karen A = $ 5,608.33

Rounding to the nearest dollar , we get

The monthly pay of Karen A = $ 5,608

Therefore , the value of A is $ 5,608

Hence ,

The total monthly pay of Karen is given by the equation A = $ 5,608

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Answer:

x = 19, y = 1

Step-by-step explanation:

f(x) = 5(x + 4) - 6

y = 5(x + 4) - 6

inverse function:

switch x and y

x = 5(y + 4) - 6

solve for y

x = 5y + 20 - 6

x = 5y + 14

x - 5y = 14

-5y = -x + 14

y = (-x + 14)/-5

y = 1/5x - 2.8

plug 19 in for x

y = 1/5(19) - 2.8

y = 3.8 - 2.8

y = 1

Answer:-3 over 7

Step-by-step explanation:

rise over run

Answer:

x < 2

Step-by-step explanation:

We are given the inequality:

[tex]6x < 12[/tex]

We want to solve for x. We must isolate x on one side of the inequality.

x is being multiplied by 6. The inverse of multiplication is division. Divide both sides of the inequality by 6.

[tex]6x/6 < 12/6[/tex]

[tex]x< 12/6[/tex]

[tex]x<2[/tex]

For the values of x where x<2, the inequality 6x < 12 is true.

Answer:

1.9 gallons of 80% and 5.7 gallons of 20%

Step-by-step explanation:

x gallons of 80% alcohol solution is mixed with y gallons of 20% alcohol to make 7.6 gallons of 35% alcohol solution.

Based on the given, we get two equations:

Let's substitute y with y = 7.6 - x:

Then we find the value of y:

So the answer is:

Answer:

1.9 gallons of the 80% solution.

5.7 gallons of the 20% solution,

Step-by-step explanation:

Let the volumes of the 80% and 20 % solutions be x  and y gallons.

Then:

x  +  y = 7.6.

Also, using amounts of pure alcohol:

0.8x + 0.2y = 7.6 * 0.35

0.8x + 0.2y = 2.66           Multiplying this equation by -5:

-4x - y = - 13.3                   Adding this to the first equation:

-3x = -5.7

= 1.9 gallons.

y = 7.6 - 1.9

=  5.7  gallons.

Answer:

Where is the plobem

Step-by-step explanation:

Follow me // i'm Followback you

Answer:

for more appropriate it would be 0-2.5, and the max is 15

Step-by-step explanation:

The domain of a graph is the possible x-values of the graph, while the range is the possible y-values.

From the attached graph (see attachment), we have the following observations.

Because the volume of a box cannot be negative, the x-values to use must correspond to non-negative y-values.

Hence, the proper domain of Noah's graph should be 0 to 2.5

And the maximum of the graph is at y = 15

Read more about domain and graphs at:

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Answer:

57,095,800 mi (= 5.71 x 10⁷ mi )

Step-by-step explanation:

given :

Distance from Mercury to Sun = 35,904,200 mi

Distance from Earth to Sun = 9.3x10⁷ = 93,000,000 mi

Distance between mercury and earth

= 93,000,000 - 35,904,200

= 57,095,800 mi

= 5.71 x 10⁷ mi (rounded to 3 sig. figures)

Answer:

-3/5

Step-by-step explanation:

To find slope we use the formula, slope = (y2-y1)/(x2-x1)

We let (3,5) be the first point so, x1 = 3 and y1 = 5

We let (8,2) be the second point so, x2 = 8 and y2 = 2

Now we plug it in the formula,

slope =  (2-5)/(8-3) = -3/5

Answer:

Step-by-step explanation:

Hello, please consider the following.

First of all, we need to complete the squares, then move the constant to the right side, as below.

[tex]x^2+y^2+4x-10y-7=0\\\\(x+2)^2-4+(y-5)^2-25-7=0\\\\(x+2)^2+(y-5)^2=36=6^2[/tex]

And then, we can read the answers from the rearranged equation.

(a) The centre is then (-2,5)

(b) The radius is 6

Thank you.

Answer:

A. −8 + 0 = -8

B. 1 × (−14) = -14

C. 19 ÷ 1 = 19

D. 0 × 104 = 0

E. −21 − 0 = 0

Step-by-step explanation:

Anything times or divided by 1 equals the other number that is not 1.

Example 1: 2,999 x 1 = 2,999

Example 2: 2,999 ÷ 1 = 2,999

Anythings times or divided by 0 is 0.

Example 1: 2,999 x 0 = 0

Example 2: 2,999 ÷ 0 = 0

Answer:

-18 if youre asking about simple subtraction

Step-by-step explanation:

Answer:

-18

Step-by-step explanation:

its like saying (-45)+27.

you have to add the 27 to 45 to get to 0 and them see how much you have left

Answer:

the answer is -4 I think

Answer:

−4

Step-by-step explanation:

(26 ÷ 13) ⋅ (−7) + 14 − 4 =

= 2 ⋅ (−7) + 14 − 4

= −14 + 14 − 4

= 0 − 4

= −4

Answer:

5+2x

Step-by-step explanation:

Answer:

Let X= Additional Amount

Equation= 5+2x=17

                     -5       -5

                   __________

                     2x=12

                    _______

                     2     2

                      X=6 is the answer, Hope that helped ya.

Step-by-step explanation:

Answer: x+y>5 or (x+y)-5

Step-by-step explanation:

There are two potential ways of writing five less than the sum of x and y. You can use an expression or an inequality.

Inequality

By using an inequality, we would use the less than sign because 5 is less than the sum of x and y.

5<x+y

We can also write it where the variables are on the left side, which is usually preferred.

x+y>5

-------------------------------------------------------------------------------------------------------------

Expression

For an expression, we would basically write an equation, but without the equals sign.

(x+y)-5

Since 5 is less than the sum of x and y, we would subtract 5 from x+y. We don't necessarily need to put parentheses around x+y since the order of operations tells us to add or subtract from left to right in order. It is still good to be specific, saying that it is the sum of x and y.

Answer:

6

Step-by-step explanation:

(14-2^3)

PEMDAS

Parentheses first

We need to follow PEMDAS inside the parentheses

Since there are no parentheses in side the parentheses, we do expoents

14 - 8

Then subtract

6

The order matters.

You have to follow the order of operations

Answer:

6

Step-by-step explanation:

use PEMDAS - (parentheses - exponents) -- (multiplication - division) -- (addition - subtraction)

PE, MD, and AS are interchangeable within their pairs. that means you can do multiplication or division first, or addition after subtraction. however, you cannot do addition/subtraction before multiplication/division.

since the exponent is within the parentheses, solve it first

= (14 - 2³)

= (14 - 8)

= 6

Answer:

41

Step-by-step explanation:

step 1. first, you should plug in all the x's.  x² is 49, 2x is 14. The

equation would then be 49-14+6 which is 41

2x would be 2 x 7 because when 2 numbers are touching, they are to be multiplied.

x² would be 7 x 7 because, when you have a number to the power of 2, you multiply it by itself.

and finally you would get, 49-14+6 and according to PEMDAS, the eqaution hsould go left to right leaving us with the answer of 41.

i hope you understand this. :)

Answer:

41

Step-by-step explanation:

x²-2x+6

Let x = 7

7^2 -2*7 +6

49 -14 +6

41