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GuDViN [60]
3 years ago
7

Plz Help!

Mathematics
2 answers:
Virty [35]3 years ago
8 0

Answer:

the answer is 20

Step-by-step explanation:

because, kahan

astra-53 [7]3 years ago
7 0

Answer:

28

Step-by-step explanation:

2×8. scayzd hduebdu uduenì jd

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*<br> 30 35 40<br> 45 50 55 60<br> 65 70 75<br> 80<br><br><br> c. Determine the median
tester [92]

Answer:

median is 55

Step-by-step explanation:

6 0
3 years ago
Plz help asap and explain plz and thx!! 7 and 6
swat32
Answer is 43 degrees for #6, and selection C for #7
4 0
3 years ago
Solve the inequality and identify solution. Please help. <br><br> 5x-4&gt;-4
Rudik [331]

Answer:

x > 0

Step-by-step explanation:

3 0
3 years ago
Find the areas of the trapezoids
Sholpan [36]

Answer:

12 units²

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = \frac{1}{2} h (b₁ + b₂ )

where h is the perpendicular height and b₁, b₂ the parallel bases

Here h = 4 ( perpendicular distance between the bases ) and

b₁ = SR = 2, b₂ = TA = 4 , then

A = \frac{1}{2} × 4 × (2 + 4) = 2 × 6 = 12 units²

5 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
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