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3 years ago

10

Jerry buys a pack of pencils that cost $3 David buys 4 sets of markers each set of marker also cost 3 what is the total cost of

the marker

1 answer:

Marat540 [252]3 years ago

7 0

The total cost of marker is 12

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The following table shows the probability of rolling the numbers 1 through 7

Marysya12 [62]

Answer:

2.0

Step-by-step explanation:

Couldn't really understnd what you wrote but I'll assume it's the standard deviation of a fair, 7-sided die

The standard deviation is just the square root of the variance (which is just the second moment minus the first moment squared)

The first moment (AKA the average is..)

$\frac{1+2+3+4+5+6+7}{7}=4$

The second moment is..

$\frac{1^2+2^2+3^2+4^2+5^2+6^2+7^2}{7}=20$

$\sqrt{20-4^2}=2$

4 0

3 years ago

If 5 more than twice a number is equal to 2 less<br> than 3 times the number, what is the number?

Vlada [557]

Answer:

7

Step-by-step explanation:

The following equation can be derived from the question

Let x = unknown number

5 + 2x = 3x - 2

collect like terms

5 + 2 = 3x - 2x

x = 7

4 0

2 years ago

Can you help me find the volume of this cube???

rewona [7]

Answer:

The answer is 15^3

Step-by-step explanation:

L*W*H

4*1 1/2*2 1/2

8 0

3 years ago

Read 2 more answers

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stepladder [879]

Answer:

x = 21

Step-by-step explanation:

3x + 18 + 4x + 15 = 180

7x + 33 = 180

7x = 147

x = 21

8 0

2 years ago

Read 2 more answers

Without multiplying, determine the sign of the product (356,864)(−194,758)

Anon25 [30]

Answer:

-6.95 x 10^10

Step-by-step explanation:

7 0

3 years ago