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3 years ago

For y = 3x - 2x2 +5x3, show how to find the value for y, when x = 3. Show your work

Mathematics

2 answers:

Ugo [173]3 years ago

6 0

Y= 3(3)–2(3)2+5(3)3
y= 9–2*3*2+5*9
y=9–12+5*9
y=9–12+45
y=42

madreJ [45]3 years ago

4 0

Answer:

Step-by-step explanation:

y = 3x - 2x² + 5×3

<em>when</em><em> </em>x = 3

y = 3(3) - 2(3)² + 15

y = 9 - 18 + 15

y = 15 + 9 - 15

y = 24 - 18

y = 6

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-7+21y+23=16 pls help rn

love history [14]

Answer:

y = 0

Step-by-step explanation:

$- 7 + 21y + 23 = 16$

$- 7 + 23 =( 23 - 7) = 16$

$16 + 21y = 16$

$21y = 0$

$y = 0 \div 21$

$\boxed{\green{y = 0}}$

4 0

2 years ago

Rewrite this standard form quadratic equation into vertex form by completing the square. Upload your work here to show your thin

Alex787 [66]

Solution :

Given the equation :

$y = x^2 - 6x+3$

$y=1(x^2 - 6x +n)+3$

$n = \left(\frac{b}{2}\right)^2$

$n = \left(\frac{6}{2}\right)^2$

n = 9

$y=1(x^2 - 6x +9-9)+3$

$y=1(x^2 - 6x +9)-9+3$

$y=1(x-3)^2- 6$

Therefore the vertex form of $y = x^2 - 6x+3$ is $y=1(x-3)^2- 6$ .

3 0

3 years ago

Triangle JKL is a right triangle. What is the length of JK?

kari74 [83]

I would go with

G: 4 cm

J: 8 cm

Let me know if you get it correct! :)

8 0

3 years ago

Read 2 more answers

For a horizontal demand curve

kkurt [141]

Answer:

d. both the slope and price elasticity of demand are equal to 0.

Step-by-step explanation:

In order to graph the demand curve, the quantity demanded is plotted along x-axis and the price is plotted along y-axis. An image attached below shows the horizontal demand curve.

Horizontal demand curve, as its name indicates, is a horizontal line which is parallel to x-axis. Since, the slope of any line parallel to x-axis is 0, we can conclude that the slope of Horizontal demand curve is 0.

A horizontal demand curve can be observed for a perfectly competitive market. Since, its a perfect competition, the price of a product by all competitors will be the same. In this case, if a firm decides to increase the price, he will loose his market share as no customer will buy the product at increased price. They will rather go with the other competitor who is offering a similar product at lower price.

On the other hand, if a competitor decides to lower his price in such case, he will experience loss. Therefore, the competitors do not have the option to change the price. Therefore, we can say the price elasticity of demand in this case is 0.

So, option D describes the horizontal demand curve correctly.

3 0

3 years ago

Ahab needs to mix 3.5 cups of liquid iced tea concentrate with 3 cups of water to make iced tea. Ahab has 21 cups of iced tea co

liraira [26]

Answer:

39 cups

Step-by-step explanation:

If we assume that the 3.5 cups of concentrate make 3.5+3 = 6.5 cups of tea, we can use the proportion ...

6.5/3.5 = x/21

to find the x cups of tea Ahab can make with 21 cups of concentrate.

Multiplying by 21, we get ...

x = 21(6.5/3.5) = 39

Ahab can make 39 cups of tea.

4 0

3 years ago