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olga nikolaevna [1]
2 years ago
12

Please help Find f(f(x)) f(x)=x^2

Mathematics
1 answer:
wlad13 [49]2 years ago
4 0
F(f(x)) = x^4.

We know f(x) = x^2, which can be substituted into f(f(x)) like this: f(x^2) = (x^2)^2.

—Using the exponent rule, multiply the powers 2*2=4.
(x^2)^2 = x^4.
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frosja888 [35]

Multply both sides of the equation by 7.

\dfrac{x}{7}\cdot 7=\dfrac{4}{5}\cdot 7\\\\x=\dfrac{28}{5}=5.6

_____

When the variable is in the numerator of a proportion like this, you can solve it by multiplying by that denominator. That multiplication cancels the denominator and gives you the value of the variable.

In general, you multiply by the reciprocal of the coefficient of x. When that coefficient is 1/7, you multiply by 7/1. Of course, you know that 7/7 = 1 and that x/1 = x.

7 0
3 years ago
Jerry has reached 39% of his weekly exercise time goal so far this week if he has exercise for a total of 78 minutes this week.
kompoz [17]

Answer:

his weekly exercise time goal in minutes = 200 minutes

Step-by-step explanation:

Jerry has reached 39% of his weekly exercise time goal.

so far this week ,he has exercise for a total of 78 minutes this week.

39% of total = 78 minutes

100%= x

X=100*78/39

X=100*2

X= 200 minutes

his weekly exercise time goal in minutes = 200 minutes

3 0
3 years ago
In class, joe notices a triangular shaped desk. leg a is 4 and leg b is 10. find<br> c.
Juli2301 [7.4K]
A^2 + b^2 = c^2 fill in the know numbers a=4 b=10
$^2 +10^2 = 116
now find the square root of that its 
c is approx 10.8 
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3 years ago
Help please !!!!!!!!!!
jeyben [28]
I posted what I have in the other post it's same question
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3 years ago
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nignag [31]
The correct answer is 108 ft squared
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