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Oksana_A [137]
3 years ago
10

When factoring to reveal the roots of the equation x² + 2x° - 9x- 18 = 0, which equations

Mathematics
1 answer:
timofeeve [1]3 years ago
7 0
1 and 3 only answer is number 2
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What is the quotient of 6/7 divided by 3/14
love history [14]

Answer:

4

Step-by-step explanation:

6/7(14/3)

(6(14))/21

4

3 0
3 years ago
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Bill Board is "lording" his SAT score over his friend, Rhoda Dendron, who took the ACT. "You only got a 25 in math," he chortled
SCORPION-xisa [38]

Answer:

Rhoda, whose ACT has a z-score of 1, scored in the 84th percentile in the ACT, compared to Bill, whose SAT has a z-score of -2, who scored in the 2nd percentile on the SAT. Due to the higher percentile(higher z-score)  on her test, Rhoda did better on her respective test than Bill, and thus, his logic is wrong.

Step-by-step explanation:

Z-score:

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.

Bill:

Scored 300, so X = 300

SAT has a μ of 500 and a σ of 100.

His z-score is:

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

Z = \frac{300 - 500}{100}

Z = -2

Z = -2 has a p-value of 0.02.

This means that Bill, whose SAT score has Z = -2, scored in the 2nd percentile.

Rhoda

Scored 25, so X = 25.

ACT has a μ of 20 and a σ of 5

Her z-score:

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

Z = \frac{25 - 20}{5}

Z = 1

Z = 1 has a p-value of 0.84

This means that Rhoda, whose ACT score has Z = 1, scored in the 84th percentile.

What is wrong with Bill’s logic ?

Rhoda, whose ACT has a z-score of 1, scored in the 84th percentile in the ACT, compared to Bill, whose SAT has a z-score of -2, who scored in the 2nd percentile on the SAT. Due to the higher percentile(higher z-score)  on her test, Rhoda did better on her respective test than Bill, and thus, his logic is wrong.

4 0
3 years ago
I need help plzzz it is due in 5 minutes
gladu [14]

Answer:

Just tried this on a calculator

)) i think its 7/2!

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Which shows all the names that apply to the figure?
saul85 [17]
The answer is A


A Parallelogram is a shape with 4 sides that has two pairs of parallel sides. The opposite sides must have equal length.  This is accurate for this shape.

A Rectangle is a shape with 4 sides that has four right angles.  This is accurate for this shape.

A rhombus is a shape with 4 sides of equal length.  This is not accurate for this shape.

A square is a shape with 4 sides of equal length and four right angles.  This is not accurate for this shape.
4 0
2 years ago
2485 pounds of sand are being packed into bags that weigh 45 pounds each.
MaRussiya [10]

Answer:

55 full bags

Step-by-step explanation:

7 0
2 years ago
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