3 years ago

What does the y-intercept represent?

Mathematics

1 answer:

Sveta_85 [38]3 years ago

5 0

The y-intercept of a line is the value of y at the point where the line crosses the y axis.

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1. In a class there are 40 students. 90% of them take exams; 3/4 of those who took the exam passed. How many students graduated?

Tpy6a [65]

Answer:

A. 27

Step-by-step explanation:

There are 40 students and 90% of them take exams

(40 students) * (0.9) = 36 students took exams

Of those 36 students, 75% (or 3/4) of them passed. Assuming passing exams means graduating:

(36 students) * (0.75 ) = 27 students graduated

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3 years ago

Write a word name as you would on a check for the dollar amount $681.66. Choose the word name that would be written on a check f

Crank

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4 years ago

Find the slope of a line parallel to 3x-y=1 A:3 B: -1/3 C: -3 D: 1/3

kozerog [31]

The answer is A.) 3

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3 years ago

Read 2 more answers

Guest ages at a ski mountain resort typically have a right-skewed distribution. Assume the standard deviation (σ) of age is 14.5

ValentinkaMS [17]

Answer: (30.49 years, 42.31 years)

Step-by-step explanation:

The formula to find the confidence interval is given by :-

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}.$

, where $\overline{x}$ = Sample mean

z* = Critical value.

$\sigma$ = Population standard deviation.

n= Sample size.

As per given , we have

$\overline{x}=36.4$

$\sigma=14.5$

n= 40

We know that the critical value for 99% confidence interval : z* = 2.576 (By z-table)

A 99 percent confidence interval for µ, the true mean age of guests will be :

$36.4\pm (2.576)\dfrac{14.5}{\sqrt{40}}\\\\ 36.4\pm (2.576)2.29265130362\\\\=36.4\pm5.90586975813\\\\\approx36.4\pm5.91\\\\=(36.4-5.91,\ 36.4+5.91)\\\\=(30.49,\ 42.31)$

∴ a 99 percent confidence interval for µ, the true mean age of guests = (30.49 years, 42.31 years)

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3 years ago

D= 5, -2, 1 e= 1, 2 Multiply matrix D by matrix E. pleeeeaaasssee help me please please please

Zepler [3.9K]

Multiply D×E. Which is 1×5. And subtracte 2

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4 years ago