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blagie [28]
3 years ago
13

F(x) = -8 (5-x), what is the value of f(-4)?

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
4 0

Answer:

f(-4) is basically just saying that you need to use the function given while x = -4.

The function given:

f(x) = -8(5-x)

We see that f(-4) means that x has to be -4, so we can substitute it in:

f(-4) = -8(5-(-4))

f(-4) = -8(9)

f(-4) = -72

Therefore, f(-4) is -72.

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9 oranges cost $3.60. How much are 4 oranges?
V125BC [204]

Answer:

      $1.60

Step-by-step explanation:

Set up an equation where you have the total oranges (o) on top and the cost (c) on the bottom. So you will have two fractions equaling each other. So you will have o/c=o/c. Now you just have to replace the variables with what you know. 9 oranges= $3.60, and you want to know how much 4 oranges cost. Since the cost per orange is the same, no matter how many oranges you buy if you divide the amount of oranges by the price you will always get the same number. So replace the variables with the numbers you know and you get,

9/$3.60=4/c

Now to solve an equal fraction problem, simply cross multiply (multiply the two numbers diagonal so 4 and 3.6), and divide (take the multiplied number and divide by the number remaining which will be the number diagonal from the variable) which gives you $1.60 for four oranges.

5 0
3 years ago
What is the slope of the line in the graph below?<br> (look at picture)
attashe74 [19]
The answer is 3/4! Explanation: use slope formula
5 0
3 years ago
If f(x) = V7x + 31 , find f(0).
Arte-miy333 [17]

Answer:

f(0) = 31

Step-by-step explanation:

We are given the following function:

f(x) = \sqrt{7x} + 31

f(0).

This is the value of f when x = 0. So

f(0) = \sqrt{7*0} + 31 = \sqrt{0} + 31 = 0 + 31 = 31

So f(0) = 31

3 0
3 years ago
I need help with this to
jek_recluse [69]

Answer: I believe the answer would be about 1

hope this helps



4 0
3 years ago
Estimate the answer for 1 2/3 x 5 1/10 (type a whole number​
Westkost [7]

Answer:

Exact Form:

17/2

Decimal Form:

8.5

Mixed Number Form:

8 1/2

6 0
3 years ago
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