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Vlad [161]
2 years ago
9

The mean score on a physics test was 75 points. Amy’s score was 67 points, which was 2 standard deviations below the mean. What

is the variance of the data set? 2 4 8 16.
Mathematics
1 answer:
Norma-Jean [14]2 years ago
7 0

Answer:

Its 16

Step-by-step explanation:

i had the same question and this was the answer on the unit test

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If you subtract 16 from my number and multiply the difference by -7, the result is -154 What is my number
adell [148]

Answer:

16-x*(-7)=-154

7x =-154-16

7x/7=-170/7

X=-24.29

Step-by-step explanation:

Let x represent "my number"

7 0
2 years ago
Evan’s family drove to a theme park for vacation. Assume they drove the same speed throughout the trip. The first day, they drov
hichkok12 [17]
50 miles per hour as they have been driving at a constant speed of 50 miles per hour throughout the trip.300/6=50 and 250/5=50
8 0
2 years ago
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A bandleader randomly select's two students out of 100 bandmembers if you and your brother are both bandmembers what is the prob
kherson [118]
<span>There are 100 * 99 = 9900 different ways to choose two students out of 100 bandmembers. You and our brother are 2 of that ways: you being selected first and you being selected second. Therefore the probability that you two are selected is 2 / 9900 = 0,000202. You can also think as the probability of you being selected among 100 bandmembers, which is 1/100, times the probability of your brother being selected among 99 members, which is 1/99 => (1/100) * (1/99) = 1/ (100*99) = 1 / 9900; plus the same for your brother being selected first and you second => [1/9900] * 2 = 2/9900, which is the same calculated above.</span>
6 0
3 years ago
What is the value of this expression? 4/15+3/5−2/3 Quick
VMariaS [17]

Answer:

I  think that would be 1/5

Explanation:

Hope this helps!

3 0
2 years ago
The graph below shows the solution to a system of inequalities: Solid line joining ordered pairs 0, 3.75 and 15, 0. Shade the po
algol [13]
(0,3.75)(15,0)
slope(m) = (0 - 3.75) / (15 - 0) = -3.75/15 = - 0.25 or -1/4

y = mx + b
slope(m) = -1/4
(15,0)...x = 15 and y = 0
now we sub
0 = -1/4(15) + b
0 = -15/4 + b
15/4 = b

y = -1/4x + 15/4
1/4x + y = 15/4....multiply by 4
x + 4y = 15.....and since it is a solid line, it contains an equal sign...and since it is shaded above the line, it is greater.
so ur inequality is : x + 4y > = 15 (thats greater then or equal)
4 0
3 years ago
Read 2 more answers
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