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2 years ago

Determine if the relationships are linear and if so are they proportional

Mathematics

1 answer:

Tanzania [10]2 years ago

8 0

Y=2-x^2
Vertex ( 0, 2 )
Focus : ( 0, 7/4 )
Axis of symmetry : x = 0
Directrix : y = 9/4

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Can someone please help me with this?

Svet_ta [14]

Increasing: (-4,-4)
Decreasing: (4,-2)

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3 years ago

What number must be added to the expression below to complete the square?

stiv31 [10]

D. 1/4

Explanation:

a perfect square is written in the form

$(x+a)^2 = x^2 + 2ax +a^2$ (1)

In our problem, we have this perfect square:

$x^2 - x + C$ (2)

with C being unknown. However, by comparing (1) and (2), we know that

$2a=-1$

So, we find

$a=-\frac{1}{2}$

and therefore, the missing term must be

$a^2 = \frac{1}{4}$

so the complete square is

$x^2 -x +\frac{1}{4}$

7 0

3 years ago

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How do I find B??????

yulyashka [42]

The graph shown below can be described using the equation y=Acos(bx)=k. Which of the following is the value of B +K.

I typed ur questions and this cite with problems came up. I believe ur answer is the following of ur question. Hope this helped. :)

4 0

3 years ago

A.y=-x+0.5<br> B.y=-x-0.5<br> C.y=x+0.5<br> D.y=x-0.5

omeli [17]

Answer:

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

The table shows a linear relationship between x and y

irga5000 [103]

We have been given a table that shows a linear relationship between x and y. We are asked to find the rate of change change of y with respect to x.

To solve our given problem, we will find the slope of the line passing through the given points.

$m=\frac{y_2-y_1}{x_2-x_1}$

Let us find slope of line using points $(-20,96)$ and $(-2,15)$ .

$m=\frac{15-96}{-2-(-20)}$

$m=\frac{-81}{-2+20}$

$m=\frac{-81}{18}$

$m=-4.5$

Therefore, the rate of change of y with respect to x is $-4.5$ .

3 0

3 years ago