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3 years ago

Solve 2x^2+3x=20 by completing the square

Mathematics

2 answers:

anzhelika [568]3 years ago

7 0

X=18/5 is what i got

ss7ja [257]3 years ago

4 0

Answer:

-21x

I think I did the math and this is what I got.

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If the area of Bianca’s rectangular backyard patio is represented by the expression x2 – 18x + 81, and the length of the patio i

Verizon [17]

<u>1) </u> $width=x-9$

2) Rectangular shape is square shape patio !

<u>Step-by-step explanation:</u>

Here we have , the area of Bianca’s rectangular backyard patio is represented by the expression x2 – 18x + 81, and the length of the patio is represented by the expression x − 9: We need to find

1. what is the expression for the width of the patio? Explain and show all work.

We know that area of rectangle = $Length(width)$

⇒ $x^2-18x+81=(x-9)(width)$

Factorizing RHS:

⇒ $x^2-9x-9x+81=(x-9)(width)$

⇒ $x(x-9)-9(x-9)=(x-9)(width)$

⇒ $(x-9)(x-9)=(x-9)(width)$

⇒ $width=x-9$

2. what special rectangular shape is the patio?

Now , we see that

$Length = x-9\\Width=x-9$

A rectangle whose length & width are equal is known as a square ! Hence , Rectangular shape is square shape patio !

8 0

3 years ago

Area of part of a circles

Fantom [35]

Answer:

56.55 or 18pi

Step-by-step explanation:

Pi time radius squared divided by two

6 0

3 years ago

Help me and I'll mark brainiest

3241004551 [841]

Answer:

$425

Step-by-step explanation:

because the closest to 400$ is 425. hope this helps

4 0

3 years ago

Read 2 more answers

Mary’s cookie jar opening has a circumference of 24 inches.

HACTEHA [7]

Answer:

75.40 inches

Step-by-step explanation:

If it is its circumference, then the answer is self-evident, 24 inches. If it is its diameter, then we must do a little calculation, multiplying the diameter by Pi to reach 75.40 inches.