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weeeeeb [17]
4 years ago
13

Graphing Quadratic function

Mathematics
1 answer:
AnnyKZ [126]4 years ago
7 0
I use a website called desmos.com when I need to graph a function. Heres a picture of what it should look like. 

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Cloud [144]

Answer:

less than

Step-by-step explanation:

4 0
4 years ago
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The perimeter of the rectangle is 80 cm. The area of the rectangle is acm2 . (i) show that x 2 40x + a = 0.​
erica [24]

Answer:

Proved

Step-by-step explanation:

Given

p = 80 ---- perimeter

a \to area

Required

x^2 + 40x + a = 0

The perimeter is calculated as:

p = 2(x + y)

Where

x,y \to the rectangle dimension

So, we have:

2(x + y) = 80

Divide by 2

x + y = 40

Make y the subject

y = 40 - x

The area of the rectangle is:

a = xy

a = x * (40 -x)

a = 40x -x^2

Equate to 0:

x^2 - 40x + a = 0

4 0
3 years ago
Find the value of b/2a+b, when a=5 and b=-2​
Murrr4er [49]

Answer:

-\frac{1}{4} or -0.25

Step-by-step explanation:

\frac{b}{2a+b}

Plug in a=5 and b=-2

\frac{-2}{2(5)+(-2)}=

\frac{-2}{10-2}=

\frac{-2}{8}=

-\frac{1}{4} or -0.25

Have a nice day! :)

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3 years ago
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ElenaW [278]
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4 years ago
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marysya [2.9K]

a + 6.6 = 12.6 \\ a = 12.6 - 6.6 \\ a = 6.0

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2 years ago
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