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3 years ago

Boiiiiiiiii I need help °~° plscrys on inside I hate math

Mathematics

2 answers:

Aleks [24]3 years ago

7 0

Answer:

1. 1/6 yd, 2/3 yd, 5/6 yd

2. 1/2 foot, 2/3 foot, 5/6 foot

3. 2/15 of an hour, 1/3, 3/4

4. 4/13 of a year, 8/13, 12/13

5. 1/2 of a pound, 5/8, 7/8

6. 1/4 of a year, 1/3, 5/6

7. 1/4 of the salary

8. 6/25 of the book

Step-by-step explanation:

HACTEHA [7]3 years ago

3 0

1. 1/6 yd, 2/3 yd, 5/6 yd

2. 1/2 foot, 2/3 foot, 5/6 foot

3. 2/15 of an hour, 1/3, 3/4

4. 4/13 of a year, 8/13, 12/13

5. 1/2 of a pound, 5/8, 7/8

6. 1/4 of a year, 1/3, 5/6

7. 1/4 of the salary

8. 6/25 of the book

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The ratio of girls to boys in a class is 5 to 4 if there are 20 boys then how many total students are in class

LuckyWell [14K]

answer:

explanation to answer:

6 0

4 years ago

At a financial institution, a fraud detection system identifies suspicious transactions and sends them to a specialist for revie

labwork [276]

Answer:

a. E(X) = 54.4

b. E(X) = 2.5

c. P(Y=2) = .0116

Step-by-step explanation:

E(X) = np = .40 probability * 136 trials = 54.4 blocked transmissions

To get the expected value, we simply multiply probability times number of trials. You can look at it in simple terms by thinking if there's a 50% chance of flipping heads and you flip a coin twice, in an ideal world you will have .5*2 = 1 head.

i. Let X represent the number of suspicious transmissions reviewed until finding the first blocked one. We will use a geometric distribution to model the "first" transmission. Whenever we're looking for the "first" time something happens, we use geometric.

ii. E(X) = 1/p , according to the geometric model.

= 1/.4 = 2.5.

We expect that the specialist will review 2.5 suspicious transactions <em>on average </em>before finding the first transmission that will be blocked.

i. Let Y represent the exact number of blocked transmissions out of 10. We will use a binomial distribution to model the "fixed" number of transmissions. Whenever we're looking for a "fixed" number of times something happens, we use binomial.

ii. P(Y=k) = (n choose k)(p^k)(q^n-k)

P(Y=2) = (¹⁰₂)(.4^2)(.6^10-2)

= 45 (.4^2)(.6^10-2) = .0016

As for calculator notation, the n choose k can be accessed on a TI-84 via MATH -> PRB -> nCr. It looks like 10 nCr 2 on the display.

Hence the probability that two transactions out of ten will be blocked is .0016 by the binomial model.

5 0

4 years ago

Determine the values of the variables in isosceles trapezoid CHLE below.

Alex73 [517]

Answer:

The values of variables x and m are 11 and 17

Step-by-step explanation:

The question has missing details as the diagram of the trapezoid isn't attached.

(See attachment).

Given that trapezoid CHLE is isosceles then the angles at the base area equal (4x)

And

The angles at the top are also equal

8m = 11x + 15

At this point, the four angles in the trapezoid are 8m, 11x + 15, 4x and 4x..

The sum of interior= 360

So,

11x + 15 + 8m + 4x + 4x = 360

Collect like terms

11x + 4x + 4x + 8m = 360 - 15

19x + 8m = 345

Substitute 11x + 15 for 8m

19x + 11x + 15 = 345

30x + 15 = 345

30x = 345 - 15

30x = 330

Divide through by 30

30x/30 = 330/30

x = 11

Recall that 8m = 11x + 15;

8m = 11(11) + 15

8m = 121 + 15

8m = 136

Divide through by 8

8m/8 = 136/8

m = 17

Hence, the values of variables x and m are 11 and 17

7 0

3 years ago

Factor completely: x^2-y^2-1.5(x-y)

guapka [62]

Answer: x^2 - y ^2 − 1.5x + 1.5y

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

What’s the area for each of these figures

Rainbow [258]

Step-by-step explanation:

you should try multiplying all the sides and don't forget that a triangle is base times height and divided by two

8 0

3 years ago

Boiiiiiiiii I need help °~° pls**crys on inside** I hate math

Boiiiiiiiii I need help °~° plscrys on inside I hate math