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STALIN [3.7K]
3 years ago
7

Derek decided to take a trip to France this summer. He had $30 in U.S. dollars to exchange for Euros. For every U.S. dollar, Der

ek received .76 Euros. How many Euros did Derek receive for his 30 U.S. dollars?
Mathematics
2 answers:
otez555 [7]3 years ago
7 0
He has 39 euros because 30
ser-zykov [4K]3 years ago
3 0
In euros Derek has twenty two dollars and eighty cents
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The perimeter of a triangle is 42 yards. The first side is 5 yards less than the second side, and the third side is 2 yards less
Maru [420]
Let the second side be equal to x Then the first side is x-5 The third side will be x-5-2 = x-7 Therefore you add all the following sides and equate it to 42 yards. Ie x+x+5+x-7 = 42 3x=44 X= 44/3 Therefore the second sides length is 44/3 The first sides length is 44/3 -5 = 29/3 The third side is 44/3 -7 = 23/3
7 0
3 years ago
(1 point) A pond contains 100 fish, of which 40 are carp. If 20 fish are caught from the lake, what are the mean and variance of
marta [7]

Answer:

E(X) = 6

Var(X) = 3.394

Step-by-step explanation:

Let X represent the number of carp caught out of the 20 fishes caught. Now, if we are to assume that each

of the (100, 20) ways to catch the 20 fishes will be equally likely.

Thus, we can say that X fulfills a hypergeometric

distribution with parameters as follows;

n = 20, N = 100, k = 30

Formula for expected mean value in hypergeometric distribution is;

E(X) = nk/N

E(X) = (20 × 30)/100

E(X) = 6

Formula for variance is;

Var(X) = (nk/N) × [((n - 1)(k - 1)/(N-1))) + (1 - nk/N)]

Var(X) = ((20 × 30)/100) × [((20 - 1)(30 - 1)/(100 - 1)) + (1 - (20 × 30/100)]

Var(X) = 6 × 0.5657

Var(X) = 3.394

5 0
2 years ago
What is the answer to this question? If x=y, then 6x=6y
Sliva [168]

Answer:

This is a true statement. I think that's what you're asking.

Step-by-step explanation:

It is true because if x=y, than 6x=6y because both sides have a 6 and x=y

8 0
3 years ago
It’s about solving systems of equations does anyone know the answer please
Rasek [7]

Answer:

A

Step-by-step explanation:

One Solution

6 0
3 years ago
Amanda and Ndiba are selling flower bulbs for a school fundraiser. Customers can buy packages of tulip bulbs and bags of daffodi
Gemiola [76]

Answer is on the attachment. Brainlist pls.

Step-by-step explanation:

5 0
3 years ago
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