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lakkis [162]
3 years ago
7

Which represents the inverse of the function f(x)=4x?

Mathematics
1 answer:
Juliette [100K]3 years ago
8 0

Answer:

h(x) = \frac{1}{4}x

Step-by-step explanation:

Suppose h is the inverse of f then

f(x) = y ⇔ h(y) = x

f(x) = y ⇔ 4x = y ⇔ x = y/4

and since x = h(y) then h(y) = y/4

then we can write :

h(x) = \frac{x}{4}

______________________

:)

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The sum of two numbers is 43 . The smaller number is 19 less than the larger number. What are the numbers?
Setler [38]
Let the smaller number be x and the larger number be y.
We can calculate this by using simultaneous equation, aka listing 2 equations out.
From given,
X + y = 43
Let this be equation no. 1
X + 19 = y
Let this number be equation 2.
We can do simultaneous equations either by substitute method or elimination. In this case I'm using substitute.
We can already obtain the value of y (in terms of x) in euqation no. 2, so all we gonna do is to put y into equation 1.
X + x + 19 = 43
Solve this by algebra.
2x = 43 - 19
X = 12
Now we know the exact value of x
Now substitute x = 12 into equation no. 2
12 + 19 = y
Y = 31
So the answer is 12 and 31
7 0
3 years ago
Solve the rational equation: x/x+1 = 2/x+1
Tju [1.3M]

Answer:

x = 2

Step-by-step explanation:

\frac{x}{x+1} =\frac{2}{x+1}

x ≠ 0

x ≠ - 2

x ≠ - 1

\frac{x}{x+1}(x+1) =\frac{2}{x+1}(x+1)

x = 2

6 0
3 years ago
X÷-1.2= -0.3 i need help with this asap pls and thank you ​
Aleks [24]

0.3×1.2

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3 0
2 years ago
Simplify. √-121+ √-25
astra-53 [7]

Answer:

6<em>i</em>

Step-by-step explanation:

sqrt(-121) - sqrt(-25)

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a circular railroad-crossing sigh has a radius of 15 inches. which measurement is closest to the area of the sigh in square inch
S_A_V [24]

Answer:

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Step-by-step explanation:

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3 years ago
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