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leva [86]
3 years ago
8

What are the x-intercepts of the functions fx)=-4(x+3)(x-9) ?​

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
8 0

Answer:

x=9 or -3

Step-by-step explanation:

used quadratic formula

standard form: ax^2 + bx +c

quadratic formula:

x= -b +- square root of b^2 -4(a)(c) divided by 2(a)

Google quadratic equation for more

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scoray [572]

Answer:

39

Step-by-step explanation:

3(6+7)

=18+21

=39

or

3(6+7)

=3(13)

=39

8 0
3 years ago
What is the sum of x^2 - 3x + 7 and 3x^2 + 5x - 9
Dmitrij [34]

Hey there!

The answer to your question is 4x^2+2x-2

Given:

x^2-3x+7 and 3x^2 +5x-9

First, we can start by adding like terms. The following are like terms:

x^2 and 3x^2

-3x and 5x

7 and -9

Now, we can add these pairs together, giving us:

4x^2

2x

-2

Now, add all this together, and we get our answer as:

4x^2 + 2x - 2

Have a terrificly amazing day!

7 0
3 years ago
Using the drawing, what's the vertex of angle 4
pshichka [43]
Using the four points around the drawing, we can see that angle four is connected to the vertex A. 

The answer I believe is:
D. Vertex A.

Hope I could help! Have a good one.
4 0
3 years ago
Read 2 more answers
melissa purchased a car at the price of 20,540 with a down payment of 3,900 and financed the rest paying 8.6% interest compounde
DaniilM [7]

Answer:

$478.06

Step-by-step explanation:

let's first start out by figuring out the present value of the loan

((20540*1.0825)+955+57)-3900

Which gives me a value of 23246.55

I'm then going to assume that the 8.6% is a nominal interest rate meaning that the effectively monthly rate is equal to .086/12=.0072

Which means we have

23246.55=X(a angle 60 at .0072) (i'm using annuities to solve this if you don't know what this is just ask)

Solve this and get $478.06

6 0
3 years ago
The width of a rectangle is shown below:
Savatey [412]
The distance between points A and C is 7 units, so to find the length we divide 35 by 7 which equals 5. Now we know that points B and D must be 5 units away from A and C, which means that B would be at (2, 3) and D would be at (2, -4). I hope this helps!
7 0
3 years ago
Read 2 more answers
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