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jekas [21]
3 years ago
5

Find the inverse of the function f(x) =x^2-5. Is the inverse a function?

Mathematics
1 answer:
Mariana [72]3 years ago
8 0
Y=x^2-5, solve for x

y+5=x^2

x=√(y+5) so 

f^-1(x)=√(y+5)
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The town librarian bought a combination of new-release movies on DVD for $20 and classic movies on DVD for $8. Let x represent t
Galina-37 [17]

Answer:

x = 1, y = 60

Step-by-step explanation:

Value of new-releases (x) = $20 each

Value of classic (y) = $8 each

Total budget = $500

Equation : 20x + 8y = 500

The librarian wants to purchase maximum DVDs. She can get more DVDs of classic movies for $8 as they are less costly.

Lets assume the librarian buys at least one new-release DVD.

x=1

20x + 8y = 500

8y + 20(1) = 500

y = 60

<em>Therefore, in a budget of $500, the librarian can purchase 60 classic movies and 1 new-release.</em>

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8 0
3 years ago
Due for 10:00am need help​
Sveta_85 [38]

Answer:

y=9b to the second power t over m

Step-by-step explanation:

should look like this

y=9b^2t/m

6 0
3 years ago
Which is the solution for the equation y=5x+3
garri49 [273]

x =  \frac{y - 3}{5}

6 0
3 years ago
The lateral area of the prism is 240 square inches. Find the total surface area.​
e-lub [12.9K]

Answer:

Its C, 288 square inches

Step-by-step explanation:

7 0
3 years ago
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Harrison went out to buy coffee for his classmates. There are 23 students in his class, counting Harrison himself. Some wanted m
NemiM [27]

Step-by-step explanation:

Let's represent the number of mochas bought with the variable M, and the number of lattes bought with the variable L.

Since there are 23 students, the total number of mochas and lattes bought must be 23. This can be represented with the following equation:

M + L = 23

We can also set up another equation based on the total amount spent on the coffe:

4.30M + 3.50L = 87.70

If we rearrange the first equation, we can solve for M:

M = 23 - L

If we substitute this into the second equation, we can solve for L:

4.30(23 - L) + 3.50L = 87.70

98.9 - 4.3L + 3.5L = 87.7

98.9 - 0.8L = 87.7

0.8L = 11.2

L = 14

Subtituting this back into the original equation, we can solve for M:

M + L = 23

M + 14 = 23

M = 9

Therefore, 9 mochas and 14 lattes were bought.

3 0
3 years ago
Read 2 more answers
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