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Tom [10]
3 years ago
13

Find f(-2) for the function: f(x)= 3x^2-1, x<1 x+2, x> 1

Mathematics
1 answer:
azamat3 years ago
8 0
F(x) = 3x² - 1
f(-2) = 3(-2)² - 1
f(-2) = 3(4) - 1
f(-2) = 12 - 1
f(-2) = 11

f(x) = x < 1
f(-2) = -2 < 1

f(x) = x + 2
f(-2) = -2 + 2
f(-2) = 0

f(x) = x > 1
f(-2) = -2 > 1
f(-2) = -2 < 1
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A
navik [9.2K]

Answer:

The number of liters of 50% antifreeze solution is 50 and the number of liters of 90% antifreeze solution is 150

Step-by-step explanation:

Let

x ----> number of liters of 50% antifreeze solution

y ----> number of liters of 90% antifreeze solution

we know that

50%=50/100=0.50

90%=90/100=0.90

80%=80/100=0.80

x+y=200

x=200-y ------> equation A

0.50x+0.90y=0.8(200) -----> equation B

substitute equation A in equation B and solve for y

0.50(200-y)+0.90y=160

100-0.50y+0.90y=160

0.40y=160-100

0.40y=60

y=150 liters

Find the value of x

x=200-y

x=200-150=50 liters

therefore

The number of liters of 50% antifreeze solution is 50

The number of liters of 90% antifreeze solution is 150

3 0
3 years ago
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HELP ME PLZ
Yuki888 [10]
B this is because 15y is 10 a
6 0
3 years ago
The angle of elevation to the top of the Empire State Building in New York is found to be 11 degrees from the ground at a distan
Svetllana [295]
Draw a picture of a building and a one mile (or 5280 feet) distance to a point from the base of the building. 

The angle of elevation is given as 11° and we want the height of the building or x. 

tan(11°) = x/5280 

5280 tan(11°) = x 

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I hope my answer has come to your help. Thank you for posting your question here in Brainly.
3 0
3 years ago
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Paper cost $49 for 10 reams. How much for 1 ream?
amid [387]
For 10 ream, it's cost = $49
So, for 1 ream, it would be: $49/10 = $4.9

So, your final answer is $4.9

Hope this helps!
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3 years ago
Complete the algebra terms with table and graph given y = 2x +3
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2 years ago
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