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Umnica [9.8K]
3 years ago
10

Work out the mean of these numbers:

Mathematics
1 answer:
Shtirlitz [24]3 years ago
6 0

Answer:

4\sqrt{3}

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

Simplify the radicals

\sqrt{27} = \sqrt{9(3)} = \sqrt{9} × \sqrt{3} = 3\sqrt{3}

\sqrt{48} = \sqrt{16(3)} = \sqrt{16} × \sqrt{3} = 4\sqrt{3}

\sqrt{75} = \sqrt{25(3)} = \sqrt{25} × \sqrt{3} = 5\sqrt{3}

Now mean is calculated as

mean = \frac{sum}{count} , then

mean = \frac{3\sqrt{3}+4\sqrt{3}+5\sqrt{3}   }{3} = \frac{12\sqrt{3} }{3} = 4\sqrt{3}

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Samantha worked 40.5 hrs this week. she makes 9.50 per hour. how much money did she earn this week?
SashulF [63]
To find out how much money Samantha earned this week, we just need to multiply the rate of money she earns per hour by the amount of hours she worked.

9.50 * 40.5 = 384.75

Samantha earned $384.75 this week.
Hope that helped! =)
5 0
4 years ago
Please help!!!!!!!!
Lynna [10]

Answer: the number, converted to base 10 is 884

Step-by-step explanation:

The table gives symbols for a base 12 numerical system and it is called Caidoz numbers.

Looking at the table, the corresponding Caidozian number that we considering is 618 to base 12. Converting 618 to base 10, it becomes

8 × 12^0 = 8 × 1 = 8

1 × 12^1 = 1 × 12 = 12

6 × 12^2 = 6 × 144 = 864

Therefore, 618 to base 12 to 618 to base 10 would be

8 + 12 + 864 = 884

8 0
3 years ago
Please please please help make sense of this
Nadya [2.5K]

The enclosed shape is that of a trapezoid. The area of a trapezoid is the product of the height of it (measured perpendicular to the parallel bases) and the average length of the two parallel bases. The formula is generally written ...

... A = (1/2)(b₁ + b₂)·h

Here, the base lengths are the y-coordinates at x=4 and x=9. The height is the distance between those two x-coordinates: 9 - 4 = 5.

You are expected to find the y-values at those two points, then use the formula for the area of the trapezoid.

You can save a little work if you realize that the average of the two base lengths is the y-coordinate corresponding to the average x-coordinate: (9+4)/2 = 6.5. That is you only need to find the y-coordinate for x=6.5 and do the area math as though you had a rectangle of that height and width 5.

Going that route, we have

... y = 2(6.5) - 1 = 13 - 1 = 12

Then the trapezoid's area is

... A = 12·5 = 60 . . . . square units.

5 0
3 years ago
According to the U.S. Census Bureau, about 24% of residents of the United States aged 25 years or older have completed at least
erastovalidia [21]

Answer:

70%

Step-by-step explanation:

8 0
3 years ago
Whats the answers 1-7?
Bingel [31]
1. Shifts up 9
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6. Reflect over x-axis, vertical stretch of 2, and shifts left 4
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6 0
3 years ago
Read 2 more answers
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