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3 years ago

What is 12.55 to the nearest 1 decimal place

1 answer:

4 0

One decimal place means one place after the decimal point, therefore you should round appropriately to get to one place after the decimal point.

The answer would therefore be 12.6 <span />

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JulijaS [17]

its b

Step-by-step explanation:

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7 0

2 years ago

troy and his sister caitlin can earn money by choosing to do chores around the house . last month caitlin earned $5 more than tw

max2010maxim [7]

Answer:

Lets solve this algebraically

25 is what troy has.

Caitlin has $55

Step-by-step explanation:

x+2x+5=80 3x=75 x=25

8 0

3 years ago

Read 2 more answers

-5 times what = 25....

Korolek [52]

-5 times -5= 25
because the negative times negative=positive

8 0

3 years ago

Read 2 more answers

The length of a rectangle board is 10 centimeters longer than its width. The width of the board is 26 centimeters. The board is

Troyanec [42]

Answer:

Area of each piece = 104 $cm^{2}$

Possible dimensions are 26 cm by 4 cm, 13 cm by 8 cm.

Step-by-step explanation:

Given that:

Dimensions of the rectangular board as:

Length of the board is 10 cm longer than its width.

Width of the board = 26 cm

Length of the board = 26 + 10 = 36 cm

The rectangular board is divided into 9 equal pieces.

To find:

Area of each piece and

the possible dimensions of each piece = ?

Solution:

First of all, let us calculate the area of bigger rectangular board.

Area of a rectangle is given by the following formula:

$Area = Length \times Width$

Area = 26 $\times$ 36 $cm^2$

Area of each smaller rectangle = $\frac{26\times 36}{9} = 104\ cm^2$

To find the possible dimensions, we need to find the factors of 104.

104 = 26 $\times$ 4

104 = 13 $\times$ 8

Therefore, the Possible dimensions are 26 cm by 4 cm

and

13 cm by 8 cm.

5 0

3 years ago

Find the mean and the standard deviation for each set of values. Show your work. 15,17,19,20,14,23,12

vekshin1

1. Mean.

$\overline{x}=\dfrac{15+17+19+20+14+23+12}{7}=\dfrac{120}{7}\approx\boxed{17.14}$

2. <span>Standard deviation.

First we have to square each value and calculate the mean of that squares:

$\overline{x^2}=\dfrac{15^2+17^2+19^2+20^2+14^2+23^2+12^2}{7}=\boxed{\dfrac{2144}{7}}$

so the variance:

$s^2=\overline{x^2}-\overline{x}^2=\dfrac{2144}{7}-\left(\dfrac{120}{7}\right)^2\approx\boxed{12.41}$

and the standard deviation:

$s=\sqrt{s^2}=\sqrt{12.41}\approx\boxed{3.52}$
</span>

3 0

3 years ago