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grin007 [14]
3 years ago
5

1

Mathematics
1 answer:
photoshop1234 [79]3 years ago
6 0

Answer:

Pentagon and I think the area is 19.89 so if you round it, that will be 19.9

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Is this equation an identity? (2x+1)^2-(x+1)^2=3(x+1)^2-1
sergey [27]

Answer:

See below, please

Step-by-step explanation:

Left side

{(2x + 1)}^{2}  -  {(x + 1)}^{2}

= (4 {x}^{2}  + 4x + 1) - ( {x}^{2}  + 2x + 1)

= (4 {x}^{2}  -  {x}^{2} ) + (4x - 2x) + (1 -1 )

= 3 {x}^{2}  + 2x

Right side

3 \times  {(x + 1)}^{2}  - 1

= 3 \times ( {x}^{2}  + 2x + 1) - 1

= 3 {x}^{2}  + 6x + 3 - 1

= 3 {x}^{2}  + 6x + 2

After compared with both sides, we can make a conclusion that

This equation isn't an identity.

6 0
2 years ago
5(x + 8) + x + y; x=3 and y=30
Thepotemich [5.8K]
Plug in 3 for x and 30 for y

5(3 + 8) + 3 + 30

Use PEMDAS

5(11) + 3 + 30

55 + 33

88 

88 is your answer

hope this helps
6 0
3 years ago
Read 2 more answers
A slice of pizza whose edges form a 32degrees angle with an outer crust edge 4 inches long was found in a gym locker. What was t
liq [111]

Answer:

The diameter was d=\frac{45}{\pi } in.

Step-by-step explanation:

The arc of a circle is given by

s=r\theta

where

s = arc length

r = radius of the circle

θ = measure of the central angle in radians.

From the information given

s = 4 in

θ = 32º

To find the diameter of the original​ pizza, we use the formula of the diameter of a circle

d=2r

First, we need to convert the angle to radians

\theta=32\º \cdot \frac{\pi}{180\º} =\frac{8\pi }{45}

Next, solve for r from the arc formula

r=\frac{s}{\theta} =\frac{4}{\frac{8\pi }{45}} =\frac{45}{2\pi }

Then, we use the diameter of a circle formula

d=2r=2(\frac{45}{2\pi })=\frac{45}{\pi }

5 0
3 years ago
Which is the equation of a line that has a slope of 2 and contains the point (0,5)
riadik2000 [5.3K]

\bf (\stackrel{x_1}{0}~,~\stackrel{y_1}{5})~\hspace{10em} slope = m\implies 2 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-5=2(x-0) \\\\\\ y-5=2x\implies y=2x+5

7 0
3 years ago
Date:
Vlad [161]

Answer:

He should enter the lottery

Step-by-step explanation:

8 0
3 years ago
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