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vodomira [7]
3 years ago
5

Suppose a normal distribution has a mean of 26 and a standard deviation of 4. What is the probability that a data value is betwe

en 28 and 31? Round your answer to the nearest tenth of a percent?
Mathematics
1 answer:
lions [1.4K]3 years ago
7 0

Answer:

20.3%

Step-by-step explanation:

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What is the value of x?
dimulka [17.4K]
Hi there!

To find x, we'll need to proceed methodically. First, we'll start by finding the length of ST. The 30-60-90 relationship tells us that ST = 2. Then, we can find RT, also using the 30-60-90 relationship. RT = 4. Lastly, we can use the 45-45-90 relationship to determine that x = 4.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
8 0
3 years ago
**<br> What is the vertex of the function f(x) = 1x2 + 3x + 3?
saw5 [17]

Answer:

(-1.5,0.75)

Step-by-step explanation:

If you graph it you can see the vertex

7 0
3 years ago
PLZ HELP, GIVING BRAINLIEST!
mote1985 [20]

Answer:

  d)  (-3/2, -1/2)

Step-by-step explanation:

The midpoint (M) between two given points is the average of their coordinate values:

  M = (A + B)/2 = ((-8, 1) +(5, -2))/2 = (-3, -1)/2

  M = (-3/2, -1/2) . . . . . matches choice D

4 0
3 years ago
If 57 is added to a number, it will be 4 times as large as it was originally. Find the number.
Sonja [21]

Answer:

19

Step-by-step explanation:

X will refer to the number.

X+57( the number added to the original.)=4x. (x time 4)

X+57=4x.

Subtract x from both sides to get the variable on one side.

(X+57)-x =(4x)-x

57=3x. You would then divide by 3 on both sides to again get integer isolated.

57/3=3/3x.

57/3=19. 3/3=1.

19=x.

6 0
3 years ago
A cosmetics company decides to compare its new nail polish product, Bella, with three other nail polish brands: Primrose, Shine,
raketka [301]
Answer=B
The explanatory variable is another term for the independent variable. The independent variable is the 'thing' that YOU decide to change/manipulate in an experiment. The type of nail polish given was the independent variable for this experiment. 
8 0
3 years ago
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