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sveticcg [70]
3 years ago
7

My brain is melting. I have no idea how to do this xD

Mathematics
2 answers:
ANTONII [103]3 years ago
8 0

Answer:

8

Step-by-step explanation:

2\frac{2}{3} = \frac{8}{3}  change it into improper fraction

multiply 3 x \frac{8}{3} = 24/3

shtirl [24]3 years ago
4 0

Answer:

its 8, so insert to forms of 8!!! so a and c!

Step-by-step explanation:

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A manufacturing process makes rods that vary slightly in length but follow a normal distribution with mean length 25 cm and stan
Galina-37 [17]

Answer:

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22)  = 0.1251

Step-by-step explanation:

<u><em>Step(i):</em></u>-

Given mean of the Population = 25cm

Given standard deviation of the Population = 2.60

Let 'x' be the random variable in normal distribution

Given x=22

Z = \frac{x-mean }{S.D} = \frac{22-25}{2.60} = -1.15

<u><em>Step(ii):</em></u>-

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22) = P( Z<-1.15)

             = 1-P(Z>1.15)

             =  1-( 0.5+A(1.15)

             =  0.5 - A(1.15)

             = 0.5 - 0.3749

             = 0.1251

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22)  = 0.1251

7 0
3 years ago
Evaluate the expression when c = 4, d = 1 and e = 10.<br><br> d+18
cestrela7 [59]
Substitute 1 for d. d+18=1+18=19
8 0
3 years ago
Find the value of given expression<br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B31%20%5Ctimes%2031%7D%20" id="TexFormul
RideAnS [48]

Answer:

31 is the answers for the question

Step-by-step explanation:

please give me brainlest

6 0
3 years ago
Read 2 more answers
Two identical blue boxes together weigh the same as three identical red boxes together. Each red box weighs 15.2 ounces. How muc
Westkost [7]

Answer:

Each blue box weighs 22.8 ounces

Step-by-step explanation:

8 0
3 years ago
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Suppose you pick two cards from a deck of 52 playing cards. What is the probability that they are both queens?
photoshop1234 [79]

Answer:

0.45% probability that they are both queens.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes

The combinations formula is important in this problem:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

Desired outcomes

You want 2 queens. Four cards are queens. I am going to call then A,B,C,D. A and B is the same outcome as B and A. That is, the order is not important, so this is why we use the combinations formula.

The number of desired outcomes is a combinations of 2 cards from a set of 4(queens). So

D = C_{4,2} = \frac{4!}{2!(4-2)!} = 6

Total outcomes

Combinations of 2 from a set of 52(number of playing cards). So

T = C_{52,2} = \frac{52!}{2!(52-2)!} = 1326

What is the probability that they are both queens?

P = \frac{D}{T} = \frac{6}{1326} = 0.0045

0.45% probability that they are both queens.

4 0
3 years ago
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