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Amiraneli [1.4K]
4 years ago
5

Which function represents a reflection of f(x) = 5(0.8)^x across the x-axis?

Mathematics
2 answers:
AURORKA [14]4 years ago
7 0

Answer:

B. g(x) = –5(0.8)^x

Step-by-step explanation:

We have the function, f(x) = 5(0.8)^x.

It is required to reflect the function about x-axis.

Now, as we know,

Reflection across x-axis will flip the graph of the function and the function f(x) becomes -f(x).

So, the reflection of f(x) = 5(0.8)^x across x-axis will give the function f(x) = -5(0.8)^x

So, we see that,

Option B i.e. g(x) = -5(0.8)^x is correct.

Vikki [24]4 years ago
6 0

Answer: The correct option is second.

Explanation:

The given function is,

f(x)=5(0.8)^x

If we graph a function is f(x), then its coordinates is defined as (x,f(x)).

When the graph of f(x) is reflect across the x-axis, then the the x-coordinate remains the same and the sign of y-coordinate is changed. It means after reflecting across the x-axis,

(x,y)\rightarrow(x,-y)

The given given equation can be written as,

y=5(0.8)^x

To find the equation of the graph after reflection across the x-axis multiply both sides by -1.

-y=-5(0.8)^x

Because f(x)=y and g(x)=-y.

g(x)=-5(0.8)^x

Therefore the second option is correct and the graph of both function is given below.

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Morgarella [4.7K]
I can't see the graph but let's use logic
hmm, more than 10 cubic feet of topsoil so the first and 2nd options are wrong

let's ee the costs
3rd option
10*1=10
2*12=24
10+24=34 and 34<50, that is fine

4th option
3*10=30
2*12=24
30+24=54
54>50, nope, that is over cost


answer is 3rd one
the one with 1 cubic yard compost and 12 cubic yard topsoil
8 0
4 years ago
Read 2 more answers
Can someone help me with this?
yulyashka [42]

Answer:

Step-by-step explanation:

We need to find the error first.

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2.4-1.9 = 0.5

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Now we find a percentage that describes how much more 2.4 is than 1.9

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Now we need to find the value of x

x= 1.2632

now we double check

1.9 Times 1.2632 = 2.4

Now we round to a whole number

1.2632 = 1

To convert a number to a percentage, you need to bring the number over a decimal point.

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4 0
2 years ago
Only one question pls help
lina2011 [118]

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4 0
3 years ago
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Gemiola [76]

Answer:

no

Step-by-step explanation:

13² should be equal to 4² + 12² for that

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hope this helps :D
7 0
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