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stiv31 [10]
3 years ago
6

In Exercise 13, solve y=f(x) for x. Then find the input when the output is 2.

Mathematics
1 answer:
andrezito [222]3 years ago
6 0

Answer:

x = ±(√y)/3

x = ±(√2)/3

Step-by-step explanation:

Put the given information in the given equation and solve for x:

f(x) = 2

2 = 9x^2 . . . . . use 2 in place of f(x)

2/9 = x^2 . . . . divide by 9

±√(2/9) = x . . . take the square root

x = ±(√2)/3 . . . simplify

_____

Using this as an example, we can solve f(x) = y in the same way:

y = 9x^2 . . . . use y for f(x)

y/9 = x^2 . . . divide by the coefficient of x^2

±√(y/9) = x . . . take the square root; next, simplify

x = ±(√y)/3 . . . . the equation solved for x. Note this matches the above when y=2.

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Which of these two expressions represent the phrase "five plus two times a number"? A. 5n+2n and 2n+5n B. 5+2n and 2+5n C. 2n+5
Allushta [10]

Answer:

It would be D because you are timing 2 by a number which would have n together

Hope this helped

3 0
3 years ago
Need some help I'm stuck on this question in the image <br><br>thank you​
saw5 [17]

Answer:

i think it's C

Step-by-step explanation:

i am very sorry if im wrong

3 0
2 years ago
Edwin deposited money into a savings account that pays a simple annual interest rate of 1.4%. He
mafiozo [28]
<h3>The deposited sum of money by Edwin is $350.</h3>

Step-by-step explanation:

Let us assume that the amount deposited  = P

The rate of interest  = 1.4%

The Simple Interest earned  = $24.50

Time  = T = 5 years

Now, as we know:

SIMPLE INTEREST  = \frac{P \times R \times T}{100}

\implies 24.50  = \frac{P \times 1.4 \times  5}{100} \\\implies P = \frac{24.50 \times 100}{1.4 \times 5}  = 350\\\implies P = 350

Hence, the deposited sum of money by Edwin is $350.

5 0
3 years ago
I JUST NEED 4 PLS!!!!!!
Alchen [17]

Answer:

C

Step-by-step explanation:

When doing 4 divided by 2 you get 2. Looking at the sign it is saying 3 is greater than the number we solve for. Since we solved and got 2 we can double check and ask is 3 greater than 2? Yes it is so that would make the statement correct.

Hope this Helps :)

6 0
3 years ago
If fx) 3x- 12, what is f2)?
bazaltina [42]

We are given function f(x) =3x-12

We have to find the value of f(2), that means we plug x as 2 in the given equation

f(2) = 3(2)-12

f(2) =6-12

f(2)=-6

Answer f(2)=-6

4 0
3 years ago
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