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3 years ago

Part A

Mathematics

2 answers:

7nadin3 [17]3 years ago

7 0

Answer:

Options A , B and D are fulfilling the requirements.

Step-by-step explanation:

Derek has $80 to spend on used books. Hardcover books cost $10 each, and paperbacks cost $20 each.

Let x be the number of hardcover books and y be the number of paperback books Derek can buy.

The total books he can buy are $10x+20y \leq80$

A. (0, 4) substituting x as 0 and y as 4

$0(10)+4(20)$

= 80

B. (2, 3) substituting x as 2 and y as 3

$2(10)+3(20)$

= $20+60$

= 80

C. (7, 2) substituting x as 7 and y as 2

$7(10)+2(20)$

= $70+40$

= 110

D. (8, 0) substituting x as 8 and y as 0

$8(10)+0(20)$

= 80

Hence, options A , B and D are fulfilling the requirements.

maxonik [38]3 years ago

6 0

The answer is A, B, and D.

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Answer:

The answer is D.

Step-by-step explanation:

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3 years ago

In a recent year, 31.6% of all registered doctors were female. If there were 53,000 female registered doctors that year, what wa

Naily [24]

Answer:

The total number of registered doctors was 167,722.

Step-by-step explanation:

Total number of doctors:

The total number of doctors is given by x.

31.6% of all registered doctors were female. 53,000 female doctors.

This means that:

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We have to solve the above equation for x. So

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2 years ago

SO CONFUSED PLEASE SOMEONE EXPLAIN! DUE SOON AND NEED HELP!!!!!!!! QUESTION IN PICTURE BELOW

jeka57 [31]

Answer:

=> Apply law of cosine

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=> input value

$z^2=6.5^2 + 9.4^2-\left(6.5\right)\left(9.4\right)\left(cos\left(131\right)\right)$

=> simplify

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=> calulcation

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=> apply rule: Distance must be greater than 0

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4 0

2 years ago

What is the area????

Ad libitum [116K]

Answer:

49.1 cm^2

Step-by-step explanation:

The appropriate area formula is ...

area = (1/2)(side 1)(side 2)(sin(angle between))

= (1/2)(10 cm)(12 cm)·sin(55°) = 60·sin(55°) cm^2

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6 0

2 years ago

Messages arrive to a computer server according to a Poisson distribution with a mean rate of 11 per hour. Determine the length o

Zarrin [17]

Answer:

The length of the interval during which no messages arrive is 90 seconds long.

Step-by-step explanation:

Let X = number of messages arriving on a computer server in an hour.

The mean rate of the arrival of messages is, λ = 11/ hour.

The random variable X follows a Poisson distribution with parameter λ = 11.

The probability mass function of X is:

$P(X=x)=\frac{e^{-11}11^{x}}{x!};\ x=0,1,2,3....$

It is provided that in t hours the probability of receiving 0 messages is,

P (X = 0) = 0.76

Compute the value of t as follows:

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Thus, the length of the interval during which no messages arrive is 90 seconds long.

6 0

3 years ago