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3 years ago

Plz help!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Andrews [41]3 years ago

8 0

Perpendiculars are any lines that intersect to make or forms a right angle.

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For what real values of does the quadratic 12x^2+kx+27=0 have nonreal roots

bija089 [108]

Answer:

k<±36

Step-by-step explanation:

Δ<0 (no real roots)

b²-4ac<0

k²-4x12x27<0

k²-1296<0

k²<1296

k<±36

3 0

3 years ago

The length of a rectangle is 8 feet longer than it is wideIf each side is increased 8 feet, then the area is multiplied by 2. Wh

Gemiola [76]

Answer:

W = 16

L = 24

Step-by-step explanation:

Let's write down the information we have first

"The length of a rectangle is 8 feet longer than it is wide"

L = W + 8

"If each side is increased 8 feet, then the area is multiplied by 2."

(L + 8)(W + 8) = 2LW

Now we can solve for W first, then L

(W + 16)(W + 8) = 2W(W + 8)

W² + 24W + 128 = 2W² + 16W

0 = W²- 8W - 128

0 = (W - 16)(W + 8)

W = 16

L = 24

(This part above is solved like quadratics)

4 0

3 years ago

Tina is joining 3 sections of a quilt. Each section has 3 rows of 15 square pieces of fabric. How many squares will be in the co

Tomtit [17]

Answer: There are 135 squares that will be in the completed quilt and No, the product change of you does not change the grouping of factors.

Step-by-step explanation:

Since we have given that

Number of sections = 3

Number of rows in each sections = 3

Number of square pieces in each row = 15

So, the number of squares that will be in the completed quilt would be

$3\times 3\times 15\\\\=9\times 15\\\\=135$

Hence, there are 135 squares that will be in the completed quilt and No, the product change of you does not change the grouping of factors.

4 0

3 years ago

1.) Is f(x)=2x^3 + 2x and odd function

Amiraneli [1.4K]

Answer:

yes, no, no

Step-by-step explanation:

For odd functions : −f(x) = f(−x) for all x

For even functions :f(x) = f(−x) for all x

1) -f(x)= -2x^3 -2x

f(-x) = -2x^3-2x

yes

2 ) f(-x) = 5x^3 -4 ≠ f(x)

3 ) f(-x) = -4x -4 ≠ f(x)

8 0

3 years ago

If 120 marks is 60% what is full marks

AveGali [126]

Let's say is "x", so, then "x" is the 100%, and we know that the 60% is 120, what the dickens is "x" anyway?

$\bf \begin{array}{ccll}
marks&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
x&100\\
120&60
\end{array}\implies \cfrac{x}{120}=\cfrac{100}{60}\implies x=\cfrac{120\cdot 100}{60}$

3 0

3 years ago