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Assoli18 [71]
4 years ago
11

The following graph shows the normal distribution of the results of an algebra test a class of 22 students took.

Mathematics
1 answer:
ivann1987 [24]4 years ago
7 0
The score of 86 is equal to a z-score of (86 - 80)/6 = 1. The score of 92 is equivalent to (92 - 80)/6 = 2. This falls within the +1sigma to +2sigma, which has 13.59% under that range. Since there are 22 students in total:
(0.1359)(22) ~ 3 students
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Plz help with this math question.Thx:) Don't forget to show your work.
sergij07 [2.7K]
You can use any data set in this table (except the row with x) to get the ratio.

so 20/196 is the ratio which equals about .102041

then multiply that decimal by the weight in the x row to see what x is

so 1078(.102041) = 110.000198 just round that to 110. you can also verify that ratio by checking other data points. for instance

490(.102041) = 50.00009 or 50

so you know x is 50 so answer is either b or d

then you know the ratio .102041, so does (10/98) = .102041

or does (98/10) = .102041

if you do the division you will see that (10/98) = .102041

so the answer is D
5 0
3 years ago
The area of the triangle is 24 square feet. what is the length of the base?
Lubov Fominskaja [6]

Answer:

16 feet

Step-by-step explanation:

Area of a Triangle: (Base*Height)/2.

Therefore, Base:(2A)/Height =(2*24)/2=16

8 0
3 years ago
The top of a rectangular table has an area of 11 square feet. It has a length that is 3.5 feet more than the width. Find the dim
pashok25 [27]

Step-by-step explanation:

If we let the width be w, then the length is w+3.5.

This means that w(w+3.5)=11

w^2 + 3.5w - 11 = 0

2w^2 + 7w - 22 = 0 (multiply both sides by 2)

(2w+11)(w-2)=0

w = -11/2 or w = 2 (disregard w = -11/2 as distance is positive)

This means that w=2, and thus the length is 2+3.5=5.5

3 0
2 years ago
What is the solution of the linear system of equations?
Maksim231197 [3]

Answer:

(-1, 1)

Step-by-step explanation:

It's where they intersect.

4 0
3 years ago
1+1....... .×10000000000
Nady [450]
The answer is 20000000000 1 plus 1 is two and 2 times 10000000000 is 20000000000
3 0
4 years ago
Read 2 more answers
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