Answer: 30/40+16/40 and 15/20+8/20 pls mark brainliest
Step-by-step explanation:
You know that 3/4+2/5=23/20.
Now select the other expressions equal to that. They are: 30/40+16/40 and 15/20+8/20
Answer:
<h2>-25b + 101</h2>
Step-by-step explanation:

Answer:
B) 
Step-by-step explanation:

Hope this helps
Answer:
Hence the correct option is option b) Yes, the upper level of one standard deviation is 72.
A score of 74 is not within one standard deviation of the mean.
Step-by-step explanation:
Here the given details are,
Mean = 68
SD = 4
Distribution is normal.
Z-score for x = 74 is given as below:
So, the score of 74 is 1.5 standard deviations from the mean.
Therefore the score is not lies between 64 and 72.
Yes, the upper level of one standard deviation is 72.
Answer:We have, 38% × x = 190
or,
38
100
× x = 190
Multiplying both sides by 100 and dividing both sides by 38,
we have x = 190 ×
100
38
x = 500
If you are using a calculator, simply enter 190×100÷38, which will give you the answer.
Step-by-step explanation: