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3 years ago

Jing participates in a trivia contest. He completes each question in 1/2 minute.

Mathematics

1 answer:

jolli1 [7]3 years ago

7 0

Answer:

300 seconds

Step-by-step explanation:

First, you have to know how much half a minute is. Half a minute is 30 seconds.

Second, you multiply 30 by 10 because he answered 10 questions.

30 * 10 = 300

So your answer is 300 seconds

Lastly, have a great day! :)

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3+c - (4+c) any1 simplfy?

kati45 [8]

3+c - (4+c)

pretend that there is a -1 in front of the bracket

3+c-1(4+c)

multiply the bracket by -1

(-1)(4)=-4

(-1)(c)=-c

3+c-4-c

3-4+c-c ( combine like terms)

+c-c=0

3-4=-1

-1+0=-1

Answer:

-1

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3 years ago

What is 33 percent in simplest form?

Morgarella [4.7K]

33% would be 0.33 when it's simplest form

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3 years ago

Which equation represents a line that passes through the point (−2, 6) and is parallel to the line whose equation is 3x − 4y = 6

mart [117]

Method 1: Realize that the desired equation will look exactly the same as the given equation 3x − 4y = 6, except that the constant will be different.

Thus, the equation of the new line is 3(-2) − 4(6) = C, where C comes out to 30.

Then the new line is 3x - 4y = 30.

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2 years ago

Use the distributive property to fill in the blanks below. <br><br>(8 x 5) + (8 x 2) = 8 x (_ + _)

alekssr [168]

The answer is anything that adds up to 7.
Examples: (5 + 2) or (3 + 4)

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3 years ago

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