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pochemuha
3 years ago
7

Which function has exactly one real solution? A. f(x) = -4x2 + 9x B. f(x) = 2x2 + 4x – 5 C. f(x) = 6x2 + 11 D. f(x) = -3x2 + 30x

– 75​
Mathematics
1 answer:
yarga [219]3 years ago
5 0

Answer:

A.

{ \tt{f(x) =  - 4 {x}^{2} + 9x }}

Step-by-step explanation:

{ \tt{f(x) = x( - 4x + 9)}}

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A rectangle has a perimeter of 12 x + 8y. If one side of the rectangle is 4x-2y, write expression of the other side.
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Answer:

The expression of the other side of the rectangle = 2x + 4y + 25

Step-by-step explanation:

The Perimeter of the rectangle is 12 x + 8y

The one side of the rectangle is 4x - 25

Let the other side of the rectangle be S

Now, the PERIMETER OF THE RECTANGLE = 2 ( SUM of BOTH SIDES)

⇒  12 x + 8y =  2(S + (4x - 25))

or, 12 x + 8y =  2S +  8 x - 50

or, 12 x + 8y - 8x + 50 = 2S

⇒ 4x + 8y + 50 = 2S

or, S = 2x + 4y + 25

Hence, the expression of the other side of the rectangle = 2x + 4y + 25

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3 years ago
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Answer:

C.

Step-by-step explanation:

1 X 26 = 26

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