The manager of a supermarket records the waiting times of 100 customers.
He wishes to calculate an estimate for the mean waiting time.
He draws this table.
Waiting Time
Number of
Midpoint (x)
fx
(minutes)
customers (0)
0-
0.5
5
2.5
1 -
1.5
28
42
2 -
2.5
32
80
3.5
26
91
3-
4-5
4.5
9
40.5
100
256
a) Complete the table.
b) Calculate an estimate for the mean. (I JUST NEED HELP ON B)

Answers

Answer 1

Answer:

2.56

Step-by-step explanation:

you add all the columns up to get an answer of 256 and divide it by 100=2.56

Answer 2

Answer:

2.4

Step-by-step explanation:


Related Questions

I need help with number 9, plz help me

Answers

i can’t see the whole question, so i tried to answer as much as i could think of

Please help. Find the value of x. Round to
the nearest tenth.
Enter the number that belongs in
the green box

Answers

Answer:

[tex]x =13.7[/tex]

Step-by-step explanation:

Given

See attachment

Required

Find x

The relationship between x, 47 and [tex]17^{\circ}[/tex] is:

[tex]sin(17^{\circ}) = \frac{x}{47}[/tex]

i.e.

[tex]sin(\theta) = \frac{Opposite}{Hypotenuse}[/tex]

Solving further:

[tex]sin(17^{\circ}) = \frac{x}{47}[/tex]

Make x the subject

[tex]x = 47 * sin(17^{\circ})[/tex]

[tex]x = 47 * 0.2924[/tex]

[tex]x =13.7428[/tex]

[tex]x =13.7[/tex] --- approximated

pleaseeeeee helppppppppppp

Answers

Ok so we have the first portion. We need to do cross multiplication first. So that would be 20(2x - 9) and 10(9)

So
20(2x - 9)=90
40x - 180=90
Then add 180 to itself then to 90
40x=270
X=6.75

Now let’s set the next one up knowing what we know from the previous one.

18(3x + 4)= 12(15)
54x + 72=180
Subtract 72 from it’s self and 180
54x=108
X=2

CAn you help witht this fast!

Answers

Answer: 150% sugar

Step-by-step explanation: Make a proportion.

150% sugar sorry if I’m wrong

· y = 3x - 7
Find the slope

Answers

Answer:

3

Step-by-step explanation:

the slope of an equation (y=mx+b) is always "m", or the coefficient right infront of x. in this case, y=3x-7, 3=m, -7=b. m is the slope, so the slope is 3.

the correct answer is 3 because is the right slope

Which expression is equivalent to 4 square root
Of x^10

Answers

A is the answer to this question

What is 8/9 divide 4

Answers

Answer: 8/9 divided by 4 is 2/9.

Step-by-step explanation: If you want to divide fractions, first you need to find the reciprocal of the second term. The reciprocal is when you swap the numerator and the denominator. The reciprocal of 4 is 1/4. Then, you multiply 8/9 is 1/4. 8 x 1 is 8, and 9 x 4 is 36. The answer is 8/36, which you can simplify into 2/9.

The value of the expression (8/9)÷4 is (8/9)×1/4.

What is PEMDAS rule?

PEMDAS rule states the correct order of simplifying an expression is as follows -: Parenthesis, exponents, multiplications, divisions, additions, and, subtractions.

Given, A fraction 8/9 and it is being divided by 4.

∴ (8/9)÷4.

= (8/9)×1/4.  (think of flipping the divisor to make it a multiplier)

= 32/9

Or

3 whole 5/9.

learn more about the PEMDAS rule here :

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find slopes , ill mark brainlist

Answers

Answer:

[tex]\frac{3}{2}[/tex] [tex]or[/tex] [tex]1\frac{1}{2}[/tex]

Step-by-step explanation:

We are given a graph and asked to find the slope.

So we can see two coordinate points, one on (0, 3) and (2, 0).

When trying to find slope, we use the method rise over run, which basically means y over x as a fraction, in which you then divide.

So count how many times it'll take for x to get to y, base it off the picture below

Since we see our numbers to be divided are 3 over 2, do the division and you get 1 1/2.

Would this be negative though? No, since the graph is in an increase, not a decrease.

answer me for brainlyest

its quite eazy tdh⊄≈∴∵ФωФ∵∴≈⊅

Answers

Answer:  1. The right side of the real object is   4   units long.  

               2. The top side of the scale drawing is   6   units long.

Step-by-step explanation:

2:1

Scale drawing: 6x8

Object: 3x4

Divide the length in the scale drawing by 2--- The right side of the real object is   4   units long.  

8/2= 4

Multiply the top side in the real object by 2--- The top side of the scale drawing is   6   units long.

3x2=6

For what value of x is the following expression
sinx
undefined for Os x <211?
1+COS X

Answers

Answer:

ti 5

Step-by-step explanation:

its 5

Use the drop-down menu to write the rule to fit the pattern for this table.

Does anyone know this one ?

Answers

Answer:

5 times

Step-by-step explanation:

5*0=5... 5*1=5... 5*2=10... 5*3=15... 5*4=20

Which of the following is a geometric sequence ?

Answers

Answer:

A, C and D is correct I know It

Which steps can be used to solve for the value of y ? 23(y+57)=178

Answers

Answer:

y= -49.26 or -49 6/23

Step-by-step explanation:

First distribute the 23 to y and 57

23y+1311=178

then subtract 1311 from both sides

23y=-1133

Then divide 23 to both sides

y= -49.2608695652

rounded: -49.3

as a fraction: -49 6/23

Click and drag like terms onto each other to simplify fully. 7-3+3+2x+4y

Answers

Answer:

2x+4y+7

Step-by-step explanation:

PLEASE HELP I WILL GIVE YOU BRAINLIEST

Answers

Answer:

yoo echo stop deleting my answers  bro

Step-by-step explanation:

Solve.

−8y ≥ 56


y ≤ 7


y ≥ 7


y ≥ –7


y ≤ −7

Answers

9514 1404 393

Answer:

  (d)   y ≤ -7

Step-by-step explanation:

The solution is found by dividing by the coefficient of y. Since that is a negative number, the sense of the comparison is reversed.

  -8y ≥ 56

  (-8y)/(-8) ≤ 56/(-8)

  y ≤ -7

Which explains why a caterpillar might look like a dangerous snake? *
(10 Points)
O A. The caterpillar and the snake have the same DNA.
B. The caterpillar and the snake have the same predators.
O C. An anti-predator adaptation has evolved in the caterpillar.
D. A behavioral adaptation has evolved in the caterpillar.

Answers

Answer:

C - An anti-predator adaptation has evolved in the caterpillar.

Step-by-step explanation:

An anti-predator adaptation has evolved in the caterpillar. By caterpillar might look like a dangerous snake.

What is adaptation?

The term adaption refers to that, In biology, there are three related definitions of adaptation. First, natural selection, a dynamic evolutionary process, adapts.

The organisms to their environments, improving their evolutionary fitness. Second, it is a state that the populace has attained throughout that process.

Both predator and prey species use a variety of camouflage strategies to survive, including adopting the appearance of fearsome or unappealing creatures.

Therefore, The right option (C) is correct.

Learn more about adaptation here:

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A medium of exchange ?

A.) People are willing to hold onto it because they’re confident that it will keep its value over time.

B.) Money simplifies the exchange process because it’s a mean of indicating how much something costs.

C.) To use money to buy the goods and services you want.

Answers

Answer:

B

Step-by-step explanation:

Divide 4 1/2 by the following unit fractions. 1/8 b. 1/4 c. 1/6

Answers

Answer:

a. 36

b. 18

c. 27

Your car can drive 300 miles on a tank of 11 gallons. Your car gets
to the hundredths place.
mpg. Round

Answers

Answer: 0.04

Step-by-step explanation:

11 gallons divided by 300 miles

11 /. 300 = 0.36666667

= 0.04

Write an equation in slope-intercept form for the line between (2,7) and (6, 19)

Answers

Answer:

Step-by-step explanation:

(19 - 7)/(6 - 2) = 12/4= 3

y - 7 = 3(x - 2)

y - 7 = 3x - 6

y = 3x + 1

what is slope of y=-x+7

Answers

Answer:

y = mx + b

because there is no number in front of the x we automatically assume the answer is 1

so the slope for the equation y = -x + 7 is -1

slope is -1

Step-by-step explanation:

if thats wrong then the slope is 1

hope this helps:)

1.
What is the measure of

2.
What is the measure of

3.
What is the measure of

Answers

Answer:

What is the Measure if what?

Step-by-step explanation:

GKW = 39°

PKG = 61°

PKW = 90°

PKF = 90°

FKM = 39°

PKM = 129°

WKF = 180°

WKM = 219°

Answer:

1.W&M=141 degerees

2.M&F=39 degerees

3.F&G=141 degerees

Step-by-step explanation:

1= if g&w were 39 degerees to search w&m

= 180-39=141degerees

w&m=141 degerees

2=the same with g&w

3= the same with w&m

A ball shaped like a sphere has a radius of 1.5 feet. What is the measurement of the volume of the ball in cubic feet?​

Answers

Answer:

9.42

Step-by-step explanation:

1.5 is the radius so you plug it into [tex]\pi r^{2}[/tex] to get about 7.07 than do get the volume of a sphere you multipy by (4/3). I used my phone so you may want to use a ti84 so you can reuse the answers to get it more exact. It is a rounded answer with rounds at each step.

(312) 9 = 3. (9.12)
O A. True
O B. False

Answers

Answer:

False

Step-by-step explanation:

Since rounding 312 to the nearest hundred will be 300 and not 3 and rounding 9.12 to the nearest one is 9

and 300≠9

In A QRS, ZRTQ - STR.
R
S
Which relationship proves that ZQRS is a right angle?

Answers

Answer:

A

Step-by-step explanation:

hhjjjjkkkdaa vhjkkjddgj hjkjcgh

HELP NOW PLEASSEE ! Find the mean absolute deviation

Answers

Mean absolute deviation (MAD) of a data set is the average distance between each data value and the mean. Mean absolute deviation is a way to describe variation in a data set. Mean absolute deviation helps us get a sense of how "spread out" the values in a data set are.

What is the y-intercept of y=2/3x+2

Answers

Answer:

(0,2)  

Step-by-step explanation:

The linear equation is mx+b=y.

m=slope

x= x coordinates

b=y intercept

y=y coordinates

In this case 2 is the y intercept.

Answer:

Y-intercepts: (0,2) so I'm pretty sure your answer is 2.

Step-by-step explanatio

I need help
With this I will mark you if your awnser is right

Answers

Answer:

[tex]\boxed {\sf Equation: 60 \textdegree +4x= 180 \textdegree} \\[/tex]

[tex]\boxed {\sf x=30}[/tex]

Step-by-step explanation:

The interior angles of a triangle must add to 180 degrees.

In this triangle, the angles are A, B , and C. So,

∠A + ∠B + ∠C= 180°

∠A is 60 degrees, ∠B is 3x, and ∠C is x. We can substitute the values in.

60°+3x+x=180°

This is the equation we can use to find the value of x.

We also have like terms: 3x and x that can be combined.

60° + (3x+x)= 180° 60° + 4x=180°

We can use the equation to solve for x. We have to isolate the variable.

60 is being added to 4x. The inverse of addition is subtraction. Subtract 60 from both sides of the equation.

60°-60°+4x=180°-60°4x= 180°-60°4x=120°

x is being multiplied by 4. The inverse of multiplication is division. Divide both sides by 4.

4x/4= 120°/4x= 120°/4 x=30

118.4 divided by 6.4 = ?
EXPLAIN YOUR ANSWER

Answers

Answer:

18.5

Step-by-step explanation:

to do this question you need to move the decimals. When your denominator has a decimal in it, you need to get rid of it. in order to do that, you have to move the decimal on both numbers so the numbers being divided would be 1184/64. Just divide from there

The division of the given numbers results as 19.

What is a Decimal number?

A decimal number is the representation of a number in whole and a part. The whole is represented by an integer while the part is equivalent to a number divided by the order of 10.

The given expression is 118.4 ÷ 6.4.

The division can be done step by step as follows,

Step 1:

Both the decimal numbers have only one digit after the decimal.

Thus, both can be multiplied by 10 to remove the decimal as follows,

118.4/6.4 = (118.4 × 10)/(6.4 × 10)

              = 1184/64

Now, the equivalent expression becomes as 1184 ÷ 64.

Step 2:

Divide 1184 and 64 with their largest common factor as follows,

(1184 ÷ 16)/(64 ÷ 16) = 76/4

Step 3:

Again divide 76 and 4 to get 19 as follows,

76/4 = 19

Hence, the given expression can be simplified to give 19 as the result.

To know more about decimal number click on,

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