Can anyone answer the first one?

(URGENT!!) Which graph models the function f(x) = -4(2)x? (2 points)

Usimov [2.4K]

Answer:

2nd Graph

Step-by-step explanation:

Bases off the graphs, you gave me, I assume your the equation is

$f(x) = - 4(2) {}^{x}$

The parent equation of this function is

$f(x) = b {}^{x}$

Let say x=0

Using the rules of exponets, the y value must be 1 so a critical point is

(0,1)

The function is multiplied by -4.

This means the function is stretched in the y direction by 4 and reflected over the x axis. So our new point will be

(0,-4).

The base 2 the function will get compressed by 1/2.

The best graph that represents this is the second graph

8 0

3 years ago

Anyone want to add me on snap its hstankevich -

Sonja [21]

Answer:

oop

Step-by-step explanation:

4 0

4 years ago

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What is the standard form of the equation of a circle that has its center at (-2, -3) and passes through the point (-2, 0)?

juin [17]

Answer:

(x - h)^2 + (y - k)^2 = 3^2

Step-by-step explanation:

The most general standard form here is

(x - h)^2 + (y - k)^2 = r^2. Since we know the center is at (-2, -3), we rewrite this equation as

(x + 2)^2 + (y + 3)^2 = r^2.

Note that the center (-2, -3) and the point (-2, 0) lie on the same vertical line, and that the vertical distance from the center to this point is 3. This is also the radius of the circle. Thus, the equation of this circle is:

(x - h)^2 + (y - k)^2 = 3^2

5 0

3 years ago

What is the sum of all possible values of y if x is a positive integer, xy > 0, and 6x+2y=25?

SIZIF [17.4K]

Option E

The sum of all possible values of y is 20

Solution:

Given that,

6x + 2y = 25

Where, xy > 0

We have to find the sum of all possible values of y if x is a positive integer

We can use values of x = 1, 2, 3, 4

For x = 5 and above, y will be negative

Substitute x = 1 in given equation

6(1) + 2y = 25

6 + 2y = 25

2y = 25 - 6

2y = 19

Divide both the sides of equation by 2

$y = \frac{19}{2}$

Substitute x = 2 in given equation

6(2) + 2y = 25

2y = 25 - 12

2y = 13

Divide both the sides of equation by 2

$y = \frac{13}{2}$

Substitute x = 3 in given equation

6(3) + 2y = 25

2y = 25 - 18

2y = 7

Divide both the sides of equation by 2

$y = \frac{7}{2}$

Substitute x = 4 in given equation

6(4) + 2y = 25

24 + 2y = 25

2y = 25 - 24

2y = 1

Divide both the sides of equation by 2

$y = \frac{1}{2}$

Now add all the values of "y"

$\text{Sum of possible values of y } = \frac{19}{2} + \frac{13}{2} + \frac{7}{2} + \frac{1}{2}\\\\\text{Sum of possible values of y } = \frac{19+13+7+1}{2}\\\\\text{Sum of possible values of y } = \frac{40}{2}=20$

Thus sum of all possible values of y is 20

3 0

3 years ago

PLEASE HELP ME IM STRUGGLING WITH MATH I NEED THE ANSWER IN LIKE 2 MINUTES PLZ

nydimaria [60]

Answer:

D

Step-by-step explanation:

I just plugged in the numbers

Change 3/4 to 0.75 and then plug in 8

0.75(8 + 12) = 15

0.75(20) = 15

15 = 15

Hope this helps :)

5 0

3 years ago

Read 2 more answers