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3 years ago

Written as a simplified polynomial in standard form, what is the result when

Mathematics

2 answers:

o-na [289]3 years ago

5 0

Answer:

9x^2 - 10x -4

Step-by-step explanation:

It is set up like this

9x^2 - 8x

- (x-2)2

First solve (x-2)2

the answer is (2x-4)

so now you can do this instead

9x^2 - 8x

- 2x - 4

----------------------------------

9x^2 - 10x +4

9x^2 minus zero is 9x^2

-8x-2x is -10x

0- -4 is 4 because that is like saying 0 + 4 because double negatives equal a positive

A simpler way is to change all the numbers to the opposite sign and then change the minus to a plus

like this

9x^2 - 8x

+ -2x + 4

----------------------------------

9x^2 - 10x +4

EleoNora [17]3 years ago

5 0

Answer:

8x^2-4x-4

Step-by-step explanation:

On delta math

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Alexandra purchases two doughnuts and three cookies at a doughnut shop and is charged $3.30. Brianna purchases five doughnuts an

Gekata [30.6K]

Answer:1 donut=$0.75 and 1 cookie=$0.6

let c be the cookie and d be the dougnut

2d +3c = 3.30 ---eq 1
5d+ 2c = 4.95 ---eq 2

4 0

4 years ago

A piece of wire 40 cm long is to be cut into two pieces. One piece will be bent to form a circle and; the other will be bent to

Brums [2.3K]

<h3>The perimeter of circle = 17.6 cm</h3><h3>Perimeter of square = 22.4 cm</h3>

Step-by-step explanation:

The total length of the wire = 40 cm

Let us assume the circumference of the circle = k cm

So, the circumference of the square = ( 40 - k) cm

Now,as circumference of circle = 2πR

⇒2πR = k cm or, R = $(\frac{k}{2\pi})$

Area of the circle = πR²

or, A = $\pi (\frac{k}{2\pi} )^2$

$= \pi \times (\frac{k^2}{(2\pi)^2} ) = \frac{k^2}{4 \pi} \\\implies A = \frac{k^2}{4 \pi}$ ....... (1)

Similarly , perimeter of square = 4 x Side

⇒ 4 x Side = ( 40 - k) cm ⇒ S = $(\frac{40 - k}{4} )$

Area of the square = (Side)² = $(\frac{40 - k}{4} ) ^2$

Solving, we get: $A = \frac{1600 + k^2 - 80 k}{16}$ ....... (1)

So, combining (1) and (2), total area A is

$A = (\frac{k^2}{4 \pi} ) + \frac{k^2 + 1600 - 80 k }{16}$

or, we get: A = 0.07962 k² + 0.0625 k² + 100 - 5 k

A = 0.1422 k² - 5 k + 100

For axis of symmetry : $k = (\frac{-b}{2a} ) = (-\frac{-5}{2(0.1420}) = 17.6$

⇒ k = 17.6 inches

So, the perimeter of circle = 17.6 cm

Perimeter of square = (40 - 17.6 ) = 22.4 cm

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3 years ago

Given: AB with coordinates of AC-3, -1) and B(2, 1)

andrezito [222]

Answer:

up 2, right 3

Step-by-step explanation:

up 2, to the right 3.

8 0

3 years ago

What is the slope of (4,-2)(2,4) ?

ahrayia [7]

The slope between these two lines is -3.

In order to find this, we plug the two points into the slope formula below.

m (slope) = (y2 - y1)/(x2 - x1)

m = (4 - -2)/(2 - 4)

m = 6/-2

m = -3

8 0

4 years ago

What equation, in point-slope form, matches the graphed line shown?

Veronika [31]

Answer:

Step-by-step explanation:

7 0

3 years ago