WORTH 40 POINTS!! Which equations represent a proportional relationship?

This question is incomplete, the complete question is;

Shoppers enter Hamilton place mall at an average of 120 per hour

what is the probability that at least 20 shoppers but no more than 23 shoppers enter the  mall between noon and 12:30 p.m.?

Answer:

the probability that at least 20 shoppers but no more than 23 shoppers enter the  mall between noon and 12:30 p.m

is 4.20787 × 10⁻⁸ ≈ 0.0000000420787  

Step-by-step explanation:

the probability that at least 20 shoppers but no more than 23 shoppers enter the  mall between noon and 12:30 p.m;

interval between noon and 12:30 is 30min

now the shoppers enter an average of  [(120 × 30) / 60] = 60 per 30min

so

P( 20 ≤ X ≥ 23 ) = P( X=20 ) + P( X=21 ) + P( X=22 ) + P( X=23 )

= [(e⁻⁶⁰(60)²⁰) / 20!] + [(e⁻⁶⁰(60)²¹) / 21!] + [(e⁻⁶⁰(60)²²) / 22!] + [(e⁻⁶⁰(60)²³) / 23!]

= [1.3159 × 10⁻⁹] + [3.7598 × 10⁻⁹] + [1.0254 × 10⁻⁸] + [2.6749 × 10⁻⁸]

= 4.20787 × 10⁻⁸ ≈ 0.0000000420787  

therefore the probability that at least 20 shoppers but no more than 23 shoppers enter the  mall between noon and 12:30 p.m is 4.20787 × 10⁻⁸ ≈ 0.0000000420787  

Answer:

4

Step-by-step explanation:

take 1 9/10 change it to 19/10 + 3/4. You will need to have a common denominator for any addition or subtraction with fractions. We multiply 19/10 by 4 to get 76/40. Multiply 3/4 by 10 to get 30/40. Now we have a common denominator.

Add across 76 + 30 = 106/40. Now simplify. How many times does 40 go into 106?

4 times. No remainder.

This question is incomplete

Complete Question

In a test with a mean of 100 and a standard deviation of 10, what is the standard score for a test score of 120?

Answer:

The standard score = 2

Step-by-step explanation:

The formula for Test (T) score is given as:

T score = zσ + μ

z = Standard or z score = ??

Standard deviation (σ) = 10

Mean (μ) = 100

Test score = 120

120 = 10z + 100

120 - 100 = 10z

20 = 10z

z = 20/10

z= 2

Therefore, the standard score = 2

Answer:

54

Step-by-step explanation:

63x 6/7

Answer:

Karla=16 Luis=18 Maria=21

Answer:

The correct answer is:

stratified sampling

Step-by-step explanation:

Stratified sampling is a type of sampling method where the population to be sampled is divided into subgroups or strata and then random selection is made, and these strata are formed based on some shared common characteristics. In this example, the population to be sampled is a population of professors, but the researcher went further to divide this group into professors, assistant professors, associate professors, adjunct professors, and visiting profesors.

Answer:

e ok

Step-by-step explanation:

ill make something after this brain :D

...............................................................

Answer:

0.15

Step-by-step explanation:

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Answer:

X = 2

Y = -3

Step-by-step explanation:

     Now you have 2, -3

Answer:

Arbaz is expected to pay $145.2 every moth after one year.

Step-by-step explanation:

We know that 150 dollars is owed every month. And after every 12 months the cost he has to pay a month decreases by 3.2% meaning we have to find what 3.2% is of 150. So we convert 3.2 into a decimal getting us 0.032

150 x 0.032 = 4.8

Now we know what 3.2% is of 150 so we subtract 4.8 from 250 and get 145.2

150 - 4.8 = 145.2

Answer:

[tex]y = \frac{4}{3}x[/tex]

Step-by-step explanation:

Given:

Variation: Direct Variation.

This can be represented as:

[tex]y\ \alpha\ x[/tex]

[tex]y = 16; x = 12[/tex]

Required

Write out the equation

First, the variation has to be converted to an equation

[tex]y\ \alpha\ x[/tex]

[tex]y = kx[/tex]

Where k represents constant of variation.

Substitute 16 for y and 12 for x

[tex]16 = k * 12[/tex]

Solve for k

[tex]k = \frac{16}{12}[/tex]

[tex]k = \frac{4}{3}[/tex]

To get the equation, we simply substitute 4/3 for k in [tex]y = kx[/tex]

[tex]y = \frac{4}{3}x[/tex]

346 I think

Step-by-step explanation:

750-348=402

402-201=201

201+145=346

Answer:

f

Step-by-step explanation:

f

Answer: a=2x 3 b=3y 5 (2x 3 -3y 5) (4x 6 +6x 3 y5 +9y 10)

Step-by-step explanation:

Answer:

he can do things that well give him money

Step-by-step explanation:

Answer:

below

Step-by-step explanation:

First, you must find the total he has: $10

Then, you must find how much he need: $13

Then, you take the smaller number to take away from the greater number: 13-10

Finally, you subtract those two numbers to find the amount the Juan needs: $3

Answer: The answer is 2.4

Step-by-step explanation:Hope this helps

Answer:

7 7/24

Step-by-step explanation:

make it a mixed number and multiply then simplify

7/4 x 25/6

25 x 7=175

6 x 4=24

175/24

7 7/24

Answer:

B, D, C

Step-by-step explanation:

Answer:

(i) False. Let A = 30° and B = 60°, then sin (A + B) = sin (30° + 60°) = sin 90° = 1 and, sin A + sin B = sin 30° + sin 60° = 1/2 + √3/2 = 1+√3/2(ii) True. sin 0° = 0 sin 30° = 1/2 sin 45° = 1/√2 sin 60° = √3/2 sin  90° = 1 Thus the value of sin θ increases as θ increases.(iii) False. cos 0° = 1 cos 30° = √3/2 cos 45° = 1/√2 cos 60° = 1/2 cos 90° = 0 Thus the value of cos θ decreases as θ increases.(iv) True. cot A = cos A/sin A cot 0° = cos 0°/sin 0° = 1/0 = undefined.

Step-by-step explanation:

Answer:

2x + 3 = 15

x = 6

2(6) + 3 = 15

Step-by-step explanation:

This is the answer because:

1) 2 x 6 = 12, 12 + 3 = 15

2) 2 + 6 + 3 = 11

Therefore, the answer is 2(6) + 3 = 15

Hope this helps!

Answer:

x=6

Step-by-step explanation:

2x+3=15

15-3=12

12/2=6

x=6

Answer:

− 21

Step-by-step explanation:

-7(-3)(-1)

21(-1)

-21

Answer:

13.3

Step-by-step explanation:

true

Answer:

a

Step-by-step explanation:

I think it's a I am not sure

Answer:

i think its 21

Step-by-step explanation:

Answer: Height = 14

Step-by-step explanation: 10.5 / 0.75 = 14

Answer:

The height is 14 inches

Answer:

so the answer is  

x = -6/5, - 14/ 5

Step-by-step explanation:

i hope this is what your looking for

Answer:

5/6 and -26/5

Step-by-step explanation:

-16 divide -2 = 8

Add 8 = 16

Remove absolute value

Positive 16 - 10 = 6

Divide 5 = 6/5

Negative -16 - 10 = -26

Divide 5 = -26/5

Answer:

The remainder is 5a

Hope this helps