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Katyanochek1 [597]
2 years ago
13

If f (x) = -2x what is f (4)

Mathematics
2 answers:
morpeh [17]2 years ago
3 0

Answer:

-8

Step-by-step explanation:

1. f(x)=-2x

2. f(4) = -2(4)

3. f(4) = -8

Hunter-Best [27]2 years ago
3 0

f(4) says "what's the y-value when x=4"?

Substitute 4 for x:

f(4) = -2 (4)

     = -8

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Are you looking for where they cross ? if so its (-1,2)
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Please help with number 7! :D please and thank you!
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fraction

Step-by-step explanation:

any number between 0 and 1 is a fraction

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2 years ago
A 64-ounce container of sports juice costs $6.50. A 48-ounce container of the same juice costs $4.25. Which juice container is t
larisa86 [58]

Answer:

The juice container that is a better buy is the 48 ounce container because the price per ounce is lower.

Step-by-step explanation:

In order to determine the juice container that is the better buy, you have to find the one that has a lower cost per ounce by dividing the price of each juice container by the number of ounces it has:

64-ounce container: 6.50/64=0.10

48-ounce container: 4.25/48=0.08

According to this, the answer is that the juice container that is a better buy is the 48 ounce container because the price per ounce is lower.

6 0
3 years ago
How to solve -2(x+3)=8​
Shtirlitz [24]
-2(x + 3) = 8

Multiply -2 with x and 3

-2x -6 = 8

Now add 6 to both sides

-2x -6 = 8
+6 +8

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Lastly divide -2 from both sides to find x


-2x = 16
—— —-
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X = -8
5 0
2 years ago
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What is the length of BC? Round to the nearest tenth.
emmasim [6.3K]

9514 1404 393

Answer:

  (c) 14.5 cm

Step-by-step explanation:

The relevant trig relation is ...

  Sin = Opposite/Hypotenuse

  sin(65°) = BC/BA

  BC = BA·sin(65°) ≈ (16 cm)·0.9063 ≈ 14.501 cm

  BC ≈ 14.5 cm

_____

<em>Additional comment</em>

As is often the case, a simple estimate is all that is needed to identify the correct answer choice.

You only need to know how the long side of a right triangle compares to the others. In an isosceles right triangle, both legs are √2/2 ≈ 0.71 times the hypotenuse. The long side of a right triangle will never be shorter than that. This means the long side must be greater than about 11.2, and cannot be greater than 16. There is only one answer choice in that range.

4 0
3 years ago
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