The amount of time spent updating websites for small businesses averages 50 minutes per week with a standard deviation of 10 minutes per week. if we consider the distribution of times as mound-shaped and symmetric, use the standard deviation to explain where we would expect "most" of the times will fall each week?
a) Way too long
b) Between 30 and 70 minutes
c) Between 40 and 60 minutes
d) Between 20 and 80 minutes

Answer:

40000, 20000

Step-by-step explanation:

Let the amount a grandchild receives be \(x\). Then, the amount a child receives is \(2x\).

Thus, \(220000=2(2x)+7x=11x \implies x=20000\).

This means each grandchild gets $20,000 and each child gets $40,000.

Answer:

59

Step-by-step explanation:

3*20-1=59

Answer:

A

Step-by-step explanation:

We need to find the correct options which represents the given equation . We can try it out by eliminating the given options , as

So , option A , and D are preferred choices .

Option A is the correct option . ✔️

We answered 72 questions correctly.

Here, we are given that our raw score was 70.

Also, total answered questions = 80

Let total number of correct answers = x

Thus, the total number of incorrect answers will be = (80 - x)

Points for 1 correct answer = 1

Thus, marks from correct answers = 1x

Points deducted for 1 incorrect answer = 1/4

Thus, marks deducted because of incorrect answers = (80-x)/4

Now, we can form the following equation-

x - (80-x)/4 = 70

{4x - 80 + x}/ 4 = 70

{4x - 80 + x} = 70 * 4

5x - 80 = 280

5x = 360

x = 360/5

x = 72

Thus, we answered 72 questions correctly.

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Your question was incomplete. Check for full content below-

On a college entrance exam, you answered 80 of 85 questions. Each correct answer adds 1 point to your raw score, each unanswered question adds nothing, and each incorrect answer subtracts 1/4 point. Your raw score was 70. How many questions did you answer correctly?

Answer:

no clue

Step-by-step explanation:

Answer:

n = 44

Step-by-step explanation:

the 'dashes ' through the 2 legs of the triangle indicate they are congruent.

then n = 44 mm

Answer:

b. 30 > 2d

   15 > d

c. 15/f < 5

   15 < 5f

   5 < f

d. 42 \(\leq\) 50 - m

   42 + m \(\leq\) 50

   m \(\leq\) 8

Answer:

 yes

Step-by-step explanation: I

go to k 12.

Answer:

A2=2(a2-1-3)

A2=2(a1-3)

A2=2(0-3)

A2=-6

A3=2(a2-3)

A3=2(-6-3)

A3=2*-9

A3=-18

A4=2(a3-3)

A4=2(-18-3)

A4=-42

The 4th term in the sequence using the given definition is -42.

for better understanding check the calcualtion below .

Calculation :

we find out the fourth term in the sequence by using the given formula

Given :

\(a_1=0\\a_n=2(a_{n-1}-3)\)

first term is given as 0

Lets find out the second term using the given formula

Substitute n =1 to find out second term

\(a_n=2(a_{n-1}-3)\\n=2\\ a_2=2(a_{2-1}-3)\\ a_2=2(a_{1}-3)\\a_2=2(0-3)\\a_2=-6\)

so the second term is -6

Find out thrid term by substituting n = 3

\(a_3=2(a_2-3)\\a_3=2(-6-3)\\a_3=-18\)

So the third term is -18 . Now find out fourth term by substituting 4 for n

\(a_4=2(a_3-3)\\a_4=2(-18-3)\\a_4=-42\)

The 4th term in the sequence using the given definition is -42

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Answer:

Complementary: (2,3) & (1,9)

Supplementary: (6,7) & (5,8)

Step-by-step explanation:

Answer:

75

Step-by-step explanation:

a^2+b^2=c^2

plug 21 and 72 for a and b respectively. Once plugged, c will equal 75.

Answer:

x = 9

Step-by-step explanation:

2x + 3(6)= 36

2x + 18= 36

    - 18    - 18

2x = 18

divide by 2

x= 9

Answer:

\(\frac{2}{\frac{1}{24} }\)

Step-by-step explanation:

2/x = 48

48x = 2

x = (2)/ (1/24)

\(\frac{2}{\frac{1}{24} }\) = 48

Step-by-step explanation:

Area of the trapezoid = height x average of bases

                 area = 4 x (8+13)/2) = 42 in^2

Area of triangle  = 1/2 base * height   = 1/2 (13-8) * 4 = 10 in^2

Answer:

C and D

Step-by-step explanation:

The lines are parallel to eachother dont worry about what the lines is in the middle

for the second question, it is the same thing, the lines are both going straight

which means that they are parallel

Answer:

C and D

Step-by-step explanation:

Answer:

Step-by-step explanation:

a=11/12

Answer:

C. 32x² + 160x² - 96x

Step-by-step explanation:

Surface area of rectangular prism is given as 2(wl + hl + hw), where:

w = width = 4x

l = (10x - 6)

h = 4x

Surface area = 2[(4x)(10x - 6) + (4x)(10x - 6) + (4x)(4x)]

= 2[40x² - 24x + 40x² - 24x + 16x²]

Combine like terms

= 2[40x² + 40x² + 16x² - 24x - 24x]

= 2[96x² - 48x]

= 2(96x²) - 2(48x)

= 192x² - 96x

192x² - 96x = 32x² + 160x² - 96x

The answer is C. 32x² + 160x² - 96x

Answer:

Step-by-step explanation:

Answer: 90%

Good Luck!

Answer:

90 / 1 your welcome

Answer:

Step-byHow do I calculate the mean?

The mean can be calculated only for numeric variables, no matter if they are discrete or continuous. It's obtained by simply dividing the sum of all values in a data set by the number of value

-step explanation:

46+57+66+63+49+52+61+68= 462/8 the total number of observation

the answer 57

Answer: Shawna made 8 baskets worth 3 which mean it's 24. if Daryl made the same shots but worth 2 it would equal 16 . 8 x 2=16

Step-by-step explanation: I can see that 16 is not an answer choice so but if they mean that 2 was taken off of 8 then 6x2=12 so 12 would be your answer. hope this helped :)

Answer:

252 is your answer

Step-by-step explanation:

Your Welcome! :)

Answer: 6.2

Step-by-step explanation:

2.9/1.3 +4.0=

2.23 + 4.0=

2.2 + 4.0=6.2

The given information is,

→ (2.9/1.3) + 4.0

Let's solve the problem,

→ (2.9/1.3) + 4.0

→ 2.23 + 4 = 6.23

Thus, the answer is 6.23.

The line perpendicular to the equation and has the same y-intercept with another is y = - 4 / 3 x + 4.

The equation of a line can be describe as follows:

y = mx + b

where

Therefore, lines that a perpendicular follows the rule below:

m₁m₂ = -1

Hence,

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

y + 6 = 3 / 4 x - 6 / 4

y =  3 / 4 x - 6 / 4 - 6

y = 3 / 4 x - 30 / 4

y = 3 / 4 x - 15 / 2

Hence,

3 / 4 m₂ = -1

m₂ = - 4 / 3

Therefore,

slope of the line is - 4 / 3

Let's find the y-intercept of the second line

4x + 5y -20 = 0

5y = -4x + 20

y = -4 / 5 x + 4

y-intercept  = 4

Therefore, the line perpendicular to the equation and has the same y-intercept with another is y = - 4 / 3 x + 4.

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Answer:

Step-by-step explanation: Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form:

x < 3

Interval Notation: ( −∞, 3)

The value of 'n' is 18 in the given equation 8n - 5 = 139.

We have to find the value of 'n'.

To do so, we need to solve the given equation.

Let us see how we can solve the given equation.8n - 5 = 139

We need to find the value of 'n'.

Let us bring the constant term to the right side by adding 5 to both the sides of the equation.8n - 5 + 5 = 139 + 5On simplifying, we get8n = 144Now, we need to isolate 'n' to find its value.

To do so, we divide both the sides by 8.8n/8 = 144/8On simplifying, we get n = 18

Therefore, the value of 'n' is 18.

Hence, the value of 'n' is 18 in the given equation 8n - 5 = 139.

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The naming method for naming a plane by making use of the names of three non colinear points on the plane, indicates that the possible name of the plane is PRL

Three or more points are non colinear points if they are not located on the same straight line.

A plane in geometric is the concept of a surface which flat, extends continuously in its dimensions, and it is without thickness or edges. A plane is therefore, a two dimensional flat surface, with no thickness and infinite extension in two dimensions.

A flat surface such as a wall, a table surface, a flat screen, a flat piece of paper, or a door are a part of a plane.

In geometry, surfaces which are flat are known as plane figures.

A plane can be formed by three non colinear points, or a line and a point which is not located on the line, and a plane can also be formed by two intersecting lines.

Therefore, a plane can be named by making use of the letters indicating three non colinear points.

Three non colinear points in the plane in the question are P, R, and L, therefore, the plane highlighted in the diagram can be named as the plane PRL

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Number of seats in each row is 51 given that a rectangular auditorium seats 2244 people and number of seats in each row exceeds the number of rows by 7. This can be obtained by assuming the value of number of seats in each row, forming quadratic equation and using quadratic formula to find root.

Here in the question it is given that,

We have to find the number of seats in each row.

Let us assume that the number of seats in each row be x.

From the given statement, number of seats in each row exceeds the number of rows by 7, we can write that,

Number of seats in one row = Number of rows + 7

x = Number of rows + 7

⇒ Number of rows = x - 7

Total number of seats in the auditorium can be written as,

⇒ (Number of seats in one row)(Number of rows) = Total number of seats

(x)(x - 7) = 2244

x² - 7x = 2244

⇒ x² - 7x - 2244 = 0

By using quadratic formula we can find the root,

x = (-b ± √b² - 4ac)/2a

here in the question, a = 1, b = -7, c = -2244

√b² - 4ac = √(-7)² - 4(1)(-2244)

√b² - 4ac = √49 + 8976

√b² - 4ac = √9025

√b² - 4ac = 95

x = (-b ± √b² - 4ac)/2a

x = (7 ± 95)/2

x = 102/2 or x = -88/2

⇒ x  = 51 or x = -44

Hence number of seats in each row is 51 given that a rectangular auditorium seats 2244 people and number of seats in each row exceeds the number of rows by 7.

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Answer:

The commission rate is 15%

Step-by-step explanation:

commission = commission rate x sales

where the commission rate is expressed as a decimal.

In this case, the salesperson earned a commission of $345 for selling $2,300 in merchandise. Therefore, we have:

345 = commission rate x 2300

To solve for the commission rate, we can divide both sides by 2300:

commission rate = 345/2300

Simplifying this expression, we get:

commission rate = 0.15

So, the commission rate is 15%

The graph of y=-3x-1 is given in the attachment.

Graph is a mathematical representation of a network and it describes the relationship between lines and points.

The given equation is  y=-3x-1

The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.

In the given equation slope is -3.

Let us find few values of x and y.

x    0    1    2     3    4

y    -1   -4   -7    -10  -13

Hence, the graph of y=-3x-1 is given in the attachment.

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