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2 years ago

Three Numbers are in the ratio of 2:3:7. What is the largest number if the sum is 288

Mathematics

1 answer:

lord [1]2 years ago

4 0

Answer:

2x + 3x + 7x = 288

12x = 288

x = 24

The largest number is therefore 7 * 24 = 168

Step-by-step explanation:

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You have found the following ages (in years) of all 5 zebras at your local zoo: 8, 11, 17, 7, 19? What is the standard deviation

ivann1987 [24]

Answer:

$\bar X = \frac{8+11+17+7+19}{5}= 12.4$

And the can be founded with this formula:

$s = \sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}$

$s = \sqrt{\frac{(8-12.4)^2 +(11-12.4)^2 +(17-12.4)^2 +(7-12.4)^2 +(19-12.4)^2}{5-1}} =5.367$

And rounded to the nearest tenth we got $s= 5.4$

Step-by-step explanation:

For this case we have the following data given:

8, 11, 17, 7, 19

The first step is calculate the sample mean with this formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = \frac{8+11+17+7+19}{5}= 12.4$

And the deviation can be founded with this formula:

$s = \sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}$

And replacing we got:

$s = \sqrt{\frac{(8-12.4)^2 +(11-12.4)^2 +(17-12.4)^2 +(7-12.4)^2 +(19-12.4)^2}{5-1}} =5.367$

And rounded to the nearest tenth we got $s= 5.4$

7 0

3 years ago

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Can you please factor (5n^2+10xn)(2n-3) all of the way down? (worth 50 pts)

Dovator [93]

Answer:

n((2n+3)(5n+2x))

Step-by-step explanation:

that is the step by step solution

5 0

3 years ago

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I just made a purchase of $130.00 but once I got my car and looked at the receipt, I realized the salesperson who helped me did

Andrej [43]

Answer:

Guessing you want me to figure out what your cost should have been. On it!

Step-by-step explanation:

130 * .15 = 19.5

130 - 19.5 = $110.5

That should be the new cost.

5 0

2 years ago

Round 6.071981 to 3 significant figures

natita [175]

Answer:

6.071

Step-by-step explanation:

All non zero numbers are significant irrespective of where decimal point is

If zero is between to numbers it is significant irrespective of where decimal point is

5 0

3 years ago

Directions for constructing the in-center of a triangle?

Marat540 [252]

Answer:

HERE YOU GOOO!!!!!

Step-by-step explanation:

1. locate the incenter by constructing the angle bisectors of at least two angles of the triangle.

2. construct a perpendicular from the incenter to one side of the triangle to locate the exact radius.

3. place compass point at the incenter and measure from the center to the point where the perpendicular crosses the side of the triangle (the radius of the circle).

4. draw the circle.

5 0

3 years ago