3 years ago

3-2x-x^2=y Given x = 2

Mathematics

2 answers:

FinnZ [79.3K]3 years ago

6 0

Answer:

$y = - 5$

Explanation:

$3 - 2x - {x}^{2} = y$

$3 - 4 - {x}^{2} = y$

$y = 3 - 4 - 4$

$y = - 1 - 4$

$y = - 5$

<h3>Hope it is helpful...</h3>

enyata [817]3 years ago

4 0

Answer:

3-2(2)-(2)^2

3-4-4

3-8

-5=y

Step-by-step explanation:

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the length of a rectangle is 3 units shorter than one -third of the width, x. Which expression represents the perimeter of the r

Mariana [72]

Answer:

A) $\frac{8}{3} x - 6$

Step-by-step explanation:

Let the width of the rectangle be x units.

$\therefore \: length \: of \: rectangle = \frac{1}{3} x - 3 \\ Perimeter \: of \: rectangle = 2(l + w) \\ = 2 \bigg( \frac{1}{3} x - 3 + x \bigg)\\ = 2 \bigg( x + \frac{1}{3} x - 3 \bigg)\\ = 2 \bigg( \frac{3x + x}{3} - 3 \bigg)\\ = 2 \bigg( \frac{4x}{3} - 3 \bigg) \\ = 2 \bigg( \frac{4x}{3} - 3 \bigg) \\ = \frac{2 \times 4x}{3} -2 \times 3 \\ \purple{ \bold{{Perimeter \: of \: rectangle = \frac{8}{3} x - 6}}}$