Subtract 120 every time but I don’t know the second one
Answer:
16
Step-by-step explanation:
32/2 = 16
So, he got 16 questions right and 16 questions wrong!
Answer:
Mean=1.4
Median=1
Mode=0
Step-by-step explanation:
We will make the frequency table based on our data as:
Number of Pets Frequency
0 15
1 10
2 6
3 4
4 3
5 2
Hence, the mean of the data is calculated as the ratio of sum of all the data point to the number of data points.
Hence,
Hence, Mean=1.4
Now the median is calculated as cumulative frequency.
Number of Pets Frequency
0 15 15
1 10 15+10=25
2 6 25+6=31
3 4 31+4=35
4 3 35+3=38
5 2 38+2=40
i.e. N=40
N/2=40/2=20
Hence, the value that lies in this range is: 25
Hence, Median=1
Also mode is the value corresponding to highest frequency.
Hence, Mode=0
Answer:
Table B
Step-by-step explanation:
Note that for y to vary inversely as x, an increase in x will cause a decrease in y. Therefore, by careful observation of tables A, B, C, and D, we would notice the following:
In table C:
As x increases from 1 to 2 to 3, y also increases from 26 to 52 to 78. Which means that an increase in x causes an increase in y. This is not an inverse variation.
In table D:
As x increases from 1 to 2 to 3, y also increases from -7 to -1 to 6. Which means that an increase in x causes an increase in y. This is also not an inverse variation.
We are left with options A and B
If y varies inversely as x, the following relationship must hold:
Where k is a constant of proportionality
considering option B:
When x = 1, y = 36
36 = k/1
k = 36 * 1
k = 36
when x = 2, y = 36/2
y = 18
when x = 3, y = 36/3
y = 12
These tally with all that is indicated in the table. Option B is an inverse variation