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Gekata [30.6K]
3 years ago
11

Example 2 Let f(x) = 3x2 - 1. Find each of the following a. f(9) b. f(-2) HELP PLS

Mathematics
2 answers:
umka21 [38]3 years ago
7 0

Answer:

Step-by-step explanation:

f(9) = 3(9)^2 - 1 = 242

f(-2) = 3(-2)^2 - 1 = 11

vazorg [7]3 years ago
6 0
F(9) is 242 abs f(-2) is 11
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Your​ school's talent show will feature 12 solo acts and 3 ensemble acts. The show will last 102 minutes. The 6 solo performers
Andrei [34K]

Answer:

each solo act will last 5 minutes and each ensemble act will last 14 minutes

Step-by-step explanation:

In the first show, we are told that there are 12 solo acts and 3 ensemble acts.

Now since each solo act lasts x​ minutes, and each ensemble act lasts y minutes and the show lasts 102 minutes, thus we have;

12x + 3y = 102 - - - - eq1

In the second show which lasts 72 minutes, we are told that there will be 6 solo acts and 3 ensemble acts.

Thus,we have;

6x + 3y = 72 - - - - eq2

Now, let's find x and y by subtracting eq 2 from eq1 to give;

6x = 30

Divide both sides by 6 to give;

x = 5

Put 5 for x in eq2;

6(5) + 3y = 72

30 + 3y = 72

3y = 72 - 30

3y = 42

y = 42/3

y = 14

Thus, each solo act will last 5 minutes and each ensemble act will last 14 minutes

3 0
3 years ago
Solve the system using elimination.
Zarrin [17]

<u>The solution is (1,2)</u>

Step-by-step explanation:

 7x + 10y = 27

 x - 10y = -19                                                                                                                    +--------------------

8x = 8

Divide by 8 on both sides

x = 1

To find y substitute any of the equations to 1

7(1) + 10y = 27

7 + 10y = 27

Substract 7 from both sides

10y = 20

Divide by 10

y = 2

7 0
3 years ago
Suppose 38 lbs of coffee beans are required to produce 2 lbs of
11111nata11111 [884]

Answer:

8550 pounds of coffee beans

Step-by-step explanation:

450 divided by 2= 225

38 times 225= 8550

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3 years ago
URGENT!! ILL GIVE<br> BRAINLIEST! AND 100 POINTS <br><br> The answer is not D
Verdich [7]

Answer:

b

Step-by-step explanation:

3 0
1 year ago
IM SICK OF ALL THE FAKE LINKS! Can I get help?
Virty [35]

Answer:

equation: 28 = 2h+ h + h or you could say 28 = 4h

h= 7

Step-by-step explanation:

since both lines are the same length they equal each other.

to get h = 7 you have to solve the equation you made.

28 = 4h

28/4 = 4h/4

7 = h

mark as brainliest please :)

5 0
3 years ago
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