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Anuta_ua [19.1K]
3 years ago
13

Find the domain of the function. f(x) = -2x + 4 A. (-∞, 0) u(0, ∞) B. (-∞, ∞) C. [-4, ∞) D. (0, ∞)

Mathematics
1 answer:
gladu [14]3 years ago
4 0
Answer B. there are any restrictions. You can represent it in any x point
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This one-dimensional figure goes on forever in two directions.
Vikki [24]
It’s line always goes in both directions
7 0
2 years ago
What’s the equation in vertex form?
pshichka [43]

Answer:

\large\boxed{y=(x+5)^2-64}

Step-by-step explanation:

\text{The vertex form of equation}\ y=ax^2+bx+c:\\\\y=a(x-h)^2+k\\\\h=\dfrac{-b}{2a},\ k=f(h)\\\\\text{We have the equation:}\ y=x^2+10x-39\to x=1,\ b=10,\ c=-39.\\\\\text{Substitute:}\\\\h=\dfrac{-10}{2(1)}=\dfrac{-10}{2}=-5\\\\k=f(-5)=(-5)^2+10(-5)-39=25-50-39=-64\\\\\text{Finally:}\\\\y=1(x-(-5))^2-64=(x+5)^2-64

8 0
3 years ago
A chef has 15 3/4 lb of beans. She packs them in freezer bags that weigh 2 1/4 lb each. How many freezer bags of beans does the
OLEGan [10]
You would need 7 freezer bags because you have to turn both fractions into improper fractions. to get that you have to multiply 15 by 4 and then add 3 so you get 63/1. Then for the next fraction, you multiply 4 by 2 and then add 1 so you get 9/1.

Now you have to divide the 2 fractions to find out how many freezer bags you need. So it would look like this. 63/1 divided by 9/1.
To divide fractions, you use the rule  (keep, change, flip) 
So you keep the first fraction 63/1 but you change to division sign to multiplication and lastly you flip the second fraction from 9/1 to 1/9 and now you multiply so it looks like this.

63/1 x 1/9 and you get 63/9 which equals 7 freezer bags. 

I hope this helped you?? :)
4 0
3 years ago
Three less than a certain number is 9. Find the number.
lilavasa [31]
12 is the correct answer
7 0
2 years ago
Read 2 more answers
Can someone PLEASE help me And I will give BRAINLY!! I don’t know if it’s the 2nd or 3rd one
tatyana61 [14]

Answer:

B

Step-by-step explanation:

Open dots represent everything leading up to a number, but do not include the number itself, and closed dots include the number. Therefore, it would need to be B.

7 0
3 years ago
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