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atroni [7]
3 years ago
15

Solve each equation with the quadratic formula. 4n^2+7n-1=-4

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
7 0
The answer i got was
n=-3/4,n=-1
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If 150 is divided by x, then the remainder is 3. What is the remainder when 296 is divided by x?
aliina [53]
The answer I think is 2. 150/7 is 21 R 3. 296/7 is 42 R 2.
8 0
3 years ago
Read 2 more answers
Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points. Rachel scored 78 p
Artemon [7]

Answer:

Keenan's z-score was of 0.61.

Rachel's z-score was of 0.81.

Step-by-step explanation:

Z-score:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points.

This means that X = 80, \mu = 77, \sigma = 4.9

So

Z = \frac{X - \mu}{\sigma}

Z = \frac{80 - 77}{4.9}

Z = 0.61

Keenan's z-score was of 0.61.

Rachel scored 78 points on an exam that had a mean score of 75 points and a standard deviation of 3.7 points.

This means that X = 78, \mu = 75, \sigma = 3.7. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{75 - 78}{3.7}

Z = 0.81

Rachel's z-score was of 0.81.

6 0
2 years ago
Find the value of x for which the lines a and b are parallel. answer : 23 20 2 19
Afina-wow [57]

Answer:

x=19

Step-by-step explanation:

These two angles are alternate interior angles and alternate interior angles are equal when the lines are parallel

148 = 7x+15

Subtract 15 from each side

148-15 =7x+15-15

133 = 7x

Divide by 7

133/7 = 7x/7

19 =x

4 0
3 years ago
At what time does the football hit the ground?? Please help
zimovet [89]
It depends on how fast it was thrown/kicked but the average is around 9/10
6 0
3 years ago
B. A square has a side length of 5 feet. <br> What is the length of each side of the square
densk [106]

Answer:

5 ft.

Step-by-step explanation:

A square is a shape comprised of all equal side lengths. Therefore, if we are given that the square has a side length of 5 feet, then every side's length would also be 5 feet.

7 0
3 years ago
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