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MrRa [10]
3 years ago
12

Guys help this is due

Mathematics
2 answers:
lesya [120]3 years ago
8 0

Answer:

x = 45

Step-by-step explanation:

Well here's what we know:

2x + 45 + x = 180

Solve from there:

3x = 135

x = 45

You can plug it back in to check:

2(45) + 45 + 45 = 180

90 + 80 = 180, so it checks out :)

s2008m [1.1K]3 years ago
3 0

Answer:

چی بود درلیوان های روی میز

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LenKa [72]

Answer:

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5 0
3 years ago
The scatter plot shows the average heights of children up to age 5.
Over [174]

Answer:

(a) y = 4.5x  + 22 -- The equation

(b) 31 inches

Step-by-step explanation:

Given

See attachment

Solving (a): The equation of the trend line.

We start  by calculating the slope (m)

m = \frac{y_2 - y_1}{x_2 - x_1}

Where

(x_1,y_1) = (0,22)

(x_2,y_2) = (4,40)

So, we have:

m = \frac{40 - 22}{4 - 0}

m = \frac{18}{4}

m = 4.5

The equation is then calculated using:

y = m(x-x_1)+y_1

Where:

(x_1,y_1) = (0,22)

m = 4.5

y = 4.5(x - 0) + 22

Open bracket

y = 4.5x - 0 + 22

y = 4.5x  + 22

(b) The height of a 2 year old.

To do this, we substitute 2 for x in y = 4.5x  + 22

y = 4.5 * 2 + 22

y = 9+ 22

y = 31

The prediction is 31 inches

7 0
3 years ago
Factor the GCF: -6x^4y^5 - 15x^3y^2 + 9x^2y^3
natta225 [31]
<span>-6x^4y^5 - 15x^3y^2 + 9x^2y^3

</span>-6x^4y^5 =  -2, 3, x, x, x, x,  y, y, y, y, y
15x^3y^2 =  -5, 3 x, x, x, y, y
9x^2y^3 =    3, 3 x, x, y, y, y

Each group has a 3 in common and each group has 2 x in common and each group has 2 y in common so the GCF = -3x^2y^2

Divide that out and we get 
\frac{-6x^4y^5 - 15x^3y^2 + 9x^2y^3}{-3x^2y^2} =
2x^2y^3 + 5x - 3y
-3x^2y^2(2x^2y^3 + 5x - 3y)

5 0
3 years ago
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