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blagie [28]
2 years ago
13

Help help its pre pre agelbra

Mathematics
1 answer:
grandymaker [24]2 years ago
3 0
I believe Line segment
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Amanda earned a score of 940 on a national achievement test that was normally distributed. The mean test score was 850 with a st
snow_lady [41]
<span>In math notation, we've done this: z = (X - μ) / σ = (940 - 850) / 100 = 0.90 where z is the z-score X is Vivian's score (940) µ is the mean (850) σ is the standard deviation (100) As you may know, in a normal distribution it's expected that about 68% of all observations will fall within 1 standard deviation of the mean, 95% will fall within 2 standard deviations, and 99% will fall within 3 standard deviations. 
940 lie before the first standard deviation, in which 16.5% is above it
since 940 is 0.9 from the mean and 0.1 from the first standard deviation
so above it is 17.5 % = 0.175 or about 0.18 </span>
4 0
3 years ago
What is the sum? (2x + 4)/(x + 1) + (- x + 5)/(x + 1) (x - 1)/(x + 1) (1 - 1)/(2x + 2) (x + 9)/(x + 1) (x + 9)/(2x + 2)
butalik [34]

Answer:

Step-by-step explanation:

Since they already have a common denominator of x+1 we can add the numerators

(2x+4-x+5)/(x+1)

(x+9)/(x+1)

4 0
3 years ago
Find the difference of 5k?-7k +6 and<br> 3k - 4k+1.<br> 2
PIT_PIT [208]

Answer:

2k-3k+5

Step-by-step explanation:

4 0
3 years ago
A set of cards contains cards numbered 1-10. Mrs. Jacobs class is conducting an experiment in which a card Is drawn from the pil
Olegator [25]

Answer:

a

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What is the value of x in the inequality
GalinKa [24]

<u>Answer & Step-by-step explanation:</u>

<u>Question 18 </u>

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form: x ≤ −10

Interval Notation: (−∞ , −10]

<u>Question 19</u>

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form: x ≤ 4

Interval Notation: (−∞ , 4]

8 0
3 years ago
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