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Serga [27]
3 years ago
14

Test scores are normally distributed with a mean of 100 and a standard deviation of 15. An individual score is found to

Mathematics
1 answer:
-BARSIC- [3]3 years ago
6 0

Answer:

Because the boundary value is less than the mean, you automatically know the z score will be negative.

z = (x - mu)/sigma = (90 - 100)/15 = -10/15 = -2/3 = -.67

Step-by-step explanation:

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Match each system to the correct choice.
pogonyaev

Answer:

Option A - Neither. Lines intersect but are not perpendicular. One Solution.

Option B - Lines are equivalent. Infinitely many solutions

Option C - Lines are perpendicular. Only one solution

Option D - Lines are parallel. No solution

Step-by-step explanation:

The slope equation is known as;

y = mx + c

Where m is slope and c is intercept.

Now, two lines are parallel if their slopes are equal.

Looking at the options;

Option D with y = 12x + 6 and y = 12x - 7 have the same slope of 12.

Thus,the lines are parrallel, no solution.

Two lines are perpendicular if the product of their slopes is -1. Option C is the one that falls into this category because -2/5 × 5/2 = - 1. Thus, lines here are perpendicular and have one solution.

Two lines are said to intersect but not perpendicular if they have different slopes but their products are not -1.

Option A falls into this category because - 9 ≠ 3/2 and their product is not -1.

Two lines are said to be equivalent with infinitely many solutions when their slopes and y-intercept are equal.

Option B falls into this category.

8 0
2 years ago
What would be the answer to 8x^6/ 8x^5 =?
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When find the margin error for the mean of a normally distributed population from a sample what is the critical probability assu
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5 0
3 years ago
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Expand the following expressions by multiplying out the brackets <br> -4(4f+3)
melisa1 [442]

Answer:

- 16f - 12

Step-by-step explanation:

- 4(4f + 3) ← multiply each term in the parenthesis by - 4

= - 16f - 12

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2 years ago
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