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OleMash [197]
3 years ago
8

Which of the following is a pair of vertical angles? EXAMPLE: 1 and 4 , 1 and 5

Mathematics
2 answers:
Dima020 [189]3 years ago
8 0
5 and 7
1 and 3
4 and 2
8 and 65
tresset_1 [31]3 years ago
6 0
5 and 7
1 and 3
4 and 2
8 and 65
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The age of some lecturers are 42,54,50,54,50,42,46,46,48 and 48 calculate the mean age and standard deviation
rjkz [21]

Answer:

Mean age: 48

Standard deviation: 4

Step-by-step explanation:

a) Mean

The formula for Mean = Sum of terms/ Number of terms

Number of terms

= 42 + 54 + 50 + 54 + 50 + 42 + 46 + 46 + 48+ 48/ 10

= 480/10

= 48

The mean age is 48

b) Standard deviation

The formula for Standard deviation =

√(x - Mean)²/n

Where n = number of terms

Standard deviation =

√[(42 - 48)² + (54 - 48)² + (50 - 48)² +(54 - 48)² + (50 - 48)² +(42 - 48)² + (46 - 48)² + (46 - 48)² + (48 - 48)² + (48 - 48)² / 10]

= √-6² + 6² + 2² + 6² + 2² + -6² + -2² + -2² + 0² + 0²/10

=√36 + 36 + 4 + 36 + 4 + 36 + 4 + 4 + 0 + 0/ 10

=√160/10

= √16

= 4

The standard deviation of the ages is 4

3 0
3 years ago
Which of the following describes the end behavior of y = -x^2+bx+c as x approaches either positive or negative infinity?
Pavlova-9 [17]
The end behavior model of y is -x^2.
As x approaches either positive or neg infinity, -x^2 will always be negative.
Thus, "B) y approaches neg infinity" is the correct one. 
Hope that will help :))

5 0
3 years ago
You received partial credit in th
Blababa [14]

Answer:

Expected value would be $ 0.896

Step-by-step explanation:

Given,

The price of the lottery ticket = $44800000,

Also, the probability of winning the grand prize = .000000020,

Thus, the expected value of the lottery ticket = value of the lottery ticket × probability of getting the lottery ticket

= 44800000 × .000000020

= $0.896

Note : value of lottery ticket = prize amount - cost of each ticket,

Here the cost price of a ticket is not given,

That's why we did not consider it.

5 0
3 years ago
7.65 x 6 <br> HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
DaniilM [7]

Answer:

the answer is 45.9

Step-by-step explanation:

hope this helps :)

can I plz have brainliest

5 0
3 years ago
Anyone know the answer?
kherson [118]

Answer:

A≈18.38

Step-by-step explanation:

Solve for area

Shape: Parallelogram

Formula: Base*Height

5.25*3.5=18.375

Round answer

Hope this helps.

6 0
2 years ago
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