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Sloan [31]
3 years ago
7

Consider the function f(x) = -4x²-9x+20. Determine f(-2)=

Mathematics
1 answer:
hoa [83]3 years ago
3 0

Step-by-step explanation:

  • you just substitute (-2) into the x values of the above function
  1. f( - 2) =  - 4( - 2)^{2}  - 9( - 2) + 20 \\ f( - 2) = 22
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When it is 2:00 p.m. in New York City, it is 9:00 PM in Athens. If you leave New York at 7:30 a.m. on Wednesday and fly to Athen
Scilla [17]
First, we determine the difference in the times between New York City and Athens. From the given above, we can conclude that the difference between the times is 7 hours. Then, we determine the time in New York when the arrived in Athens. 
               Time in New York : 7:30 am + (13 hours + 45 minutes) 
                                           = 21:15 or 9:15 pm of Wednesday
Then, we translate this to time in Athens by adding the difference to our answer above,
             Time in Athens: 9:15 pm Wednesday + 7 hours 
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Y = x² + 4x + 8<br> Sketch the graph of each function be sure to show your table of values
kherson [118]

Answer:

see attachment

Step-by-step explanation:

We want to sketch the graph of

y =  {x}^{2}  + 4x + 8

We want to use tables so we choose some few points and plot.

When x=-6,

y=(-6)²+4(-6)+8=20

When x=-4,

y=(-4)²+4(-4)+8=8

When x=0,

y=(-2)²+4(-2)+8=4

When x=0,

y=(0)²+4(0)+8=8

When x=2,

y=(2)²+4(2)+8=20

The table and graph are shown in attachment.

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What is the change in elevation from 8500 m to 3400 m?
zubka84 [21]

Answer:

5100m

Step-by-step explanation:

Let's do some subtraction!

8500-3400= 5100m

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