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sasho [114]
2 years ago
12

Y-125 = O A. -15 O B. -25 O c. -5 C. O D. 5 or -5​

Mathematics
1 answer:
timurjin [86]2 years ago
3 0

Answer:

-5

Step-by-step explanation:

Cube root of -125 has to be -5

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For a standard normal random variable, what z-score has (a) probability 0.175 to the right?
Mumz [18]
Answer: 0.935

Explanation: 

Let S = z-score that has a probability of 0.175 to the right. 

In terms of normal distribution, the expression "probability to the right" means the probability of having a z-score of more than a particular z-score, which is Z in our definition of variable Z. In terms of equation:

P(z ≥ S) = 0.175   (1)

Equation (1) is solvable using a normal distribution calculator (like the online calculator in this link: http://stattrek.com/online-calculator/normal.aspx). However, the calculator of this type most likely provides the value of P(z ≤ Z), the probability to the left of S.

Nevertheless, we can use the following equation:

P(z ≤ S) + P(z ≥ S) = 1 
⇔ P(z ≤ S) = 1 - P(z ≥ S)  (2)

Now using equations (1) and (2):

P(z ≤ S) = 1 - P(z ≥ S)
P(z ≤ S) = 1 - 0.175 
P(z ≤ S) = 0.825

Using a normal distribution calculator (like in this link: http://stattrek.com/online-calculator/normal.aspx),

P(z ≤ S) = 0.825
⇔ S = 0.935 

Hence, the z-score of 0.935 has a probability 0.175 to the right.
7 0
3 years ago
A cylinder is sliced by a plane that is not parallel to the base
pickupchik [31]
I guess you are asking  what is the shape of the cross section. 

It will be an ellipse.
4 0
3 years ago
Graph a direct variation function that goes through the point (-2, -6). what is the slope
Effectus [21]

Answer:

The slope is 3.

Step-by-step explanation:

A direct variation function will always go through the origin point (0, 0).

Therefore, we have the two points (0, 0) and (-2, -6).

We can use the slope formula to find the slope:

\displaystyle m=\frac{y_2-y_1}{x_2-x_1}

Substitute and evaluate:

\displaystyle m=\frac{0-(-6)}{0-(-2)}=\frac{6}{2}=3

Therefore, the slope of the function is 3.

To graph, simply plot (0, 0) and (-2, -6) and draw a line connecting them. This is shown below.

6 0
2 years ago
Read 2 more answers
Algebra 1 9th grade<br>-2x=-18/3​
cupoosta [38]
You would just decide both sides by 2.

-x = -9/3 ⇨ -3
Since both numbers are negative, the product becomes a positive.
x=3

Hope this helped!
6 0
3 years ago
Use the net to find the surface area of the square pyramid.
damaskus [11]

Answer:

The answer is B

Step-by-step explanation:

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base area = (24×24)in

= 576in²

area of triangle = (1/2)×24×12

= 144in²

S.A = 576 + 4(144)

= 1152in²

5 0
3 years ago
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