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Lisa [10]
3 years ago
8

How do i solve 20m-2m

Mathematics
2 answers:
solniwko [45]3 years ago
7 0

You say to yourself  "Self !  This is easy, and I refuse to let it scare me ! 
I know that 20 dollars minus 2 dollars leaves 18 dollars. 
And I know that 20 cows minus 2 cows leaves 18 cows. 
And I know that 20 puppies minus 2 puppies leaves 18 puppies. 
So it's obvious to me that 20 of anything minus 2 of the same thing
is always 18 of them. 
It doesn't matter whether the things are hairbows, goldfish, cars,
CDs, books, or 'x', 'y', or 'z'. 
So 20m minus 2m is definitely 18m."

Ierofanga [76]3 years ago
5 0
Just - the numbers and put the m on the endof it...20m-2m=18m
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HELP ASAP<br><br>what is the value of x enter your answer in the box​
Alexxx [7]

Answer:

x=25

Step-by-step explanation:

24²+7²=625

√625= 25

5 0
3 years ago
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amy is going to put 6 triangular tables together to make one large hexagon shaped table. what will be the area of the hexagon ta
tresset_1 [31]

Answer:

The area of the hexagonal table will be 27 square feet

Step-by-step explanation:

Given:

The height of the triangle = 3 feet

The base of the triangle = 3 feet

To Find:

The area of the hexagonal table = "

Solution:

<u>Step 1: Finding the area of the triangle</u>

The area of the triangle  =\frac{1}{2} \times base \times height

On substituting the values

The area of the triangle is =\frac{1}{2} \times 3 \times 3

The area of the triangle  = \frac{9}{2} square feet

<u>Step 2 : Finding the area of the hexagonal table </u>

The area of the hexagonal table is  =  6  X area of one triangle

The area of the hexagonal table  = 6 \times \frac{9}{2}

The area of the hexagonal table  = \frac{54}{2}

The area of the hexagonal table  = 27 square feet

3 0
3 years ago
Read 2 more answers
Can someone help asap?<br> What is the length of red segment EC to the nearest tenth?
oksano4ka [1.4K]
First you find the length of the green rectangle by using a^2 + b^2 = c^2
So that means 4^2 + 7^2 = length of green
That equals 8.1 when you square root it.
Then, you use 8.1^2 + 3^2 (which is the green rectangle height) to find the red line using the same equation
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8 0
3 years ago
This week, we are covering relationships that can be approximated by linear equations. For instance, y = 453x + 3768 represents
lana [24]

Answer:

See explanation below.

Step-by-step explanation:

We assume that the data is given by :

x: 30, 30, 30, 50, 50, 50, 70,70, 70,90,90,90

y: 38, 43, 29, 32, 26, 33, 19, 27, 23, 14, 19, 21.

Where X represent the cost for scholarships in thousands of dollars and y represent the cost of life for an academic semester (The data comes from the web)

We can find the least-squares line appropriate for this data.  

For this case we need to calculate the slope with the following formula:

m=\frac{S_{xy}}{S_{xx}}

Where:

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}

So we can find the sums like this:

\sum_{i=1}^n x_i = 30+30+30+50+50+50+70+70+70+90+90+90=720

\sum_{i=1}^n y_i =38+43+29+32+26+33+19+27+23+14+19+21=324

\sum_{i=1}^n x^2_i =30^2+30^2+30^2+50^2+50^2+50^2+70^2+70^2+70^2+90^2+90^2+90^2=49200

\sum_{i=1}^n y^2_i =38^2+43^2+29^2+32^2+26^2+33^2+19^2+27^2+23^2+14^2+19^2+21^2=9540

\sum_{i=1}^n x_i y_i =30*38+30*43+30*29+50*32+50*26+50*33+70*19+70*27+70*23+90*14+90*19+90*21=17540

With these we can find the sums:

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=49200-\frac{720^2}{12}=6000

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}=17540-\frac{720*324}{12}{12}=-1900

And the slope would be:

m=-\frac{1900}{6000}=-0.317

Nowe we can find the means for x and y like this:

\bar x= \frac{\sum x_i}{n}=\frac{720}{12}=60

\bar y= \frac{\sum y_i}{n}=\frac{324}{12}=27

And we can find the intercept using this:

b=\bar y -m \bar x=27-(-0.317*60)=46.02

So the line would be given by:

y=-0.317 x +46.02

We have an inverse linear relationship since the slope is negative between the variables of interest.

8 0
4 years ago
Literally anything helps
ikadub [295]

Answer:

B

Step-by-step explanation:

1.5 x 1.5 x 3.6 = 8.1

8.1/2 = 4.05 cm^3

6 0
3 years ago
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