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NikAS [45]
2 years ago
15

Please please please.

Mathematics
1 answer:
sesenic [268]2 years ago
4 0
the possibilities are probably b, using the elimination method
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Evaluate f(x) = 4x + 3x^2 − 5 when x = -2.<br> 23<br><br><br> -1<br><br><br> -25<br><br><br> -49
frozen [14]

Answer:

f(-2) = -1

Step-by-step explanation:

One way of doing this is to substitute -2 for x in every place where x shows up:

f(x) = 4x + 3x^2 − 5  →  f(-2) = 4(-2) + 3(-2)^2 − 5  

                                 → f(-2)  = -8    + 3(4) -   5, or f(-2) = 4 - 5, or f(-2) = -1

5 0
3 years ago
Does 8,6,4 contain numbers that are less than 10
raketka [301]
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6 0
3 years ago
The day length in Manila, Philippines, varies over time in a periodic way that can be modeled by a trigonometric function.
iris [78.8K]

Answer:

  • L(t) = 727.775 -51.875cos(2π(t +11)/365)
  • 705.93 minutes

Step-by-step explanation:

a) The midline of the function is the average of the peak values:

  (675.85 +779.60)/2 = 727.725 . . . minutes

The amplitude of the function is half the difference of the peak values:

  (779.60 -675.85)/2 = 51.875 . . . minutes

Since the minimum of the function is closest to the origin, we choose to use the negative cosine function as the parent function.

Where t is the number of days from 1 January, we want to shift the graph 11 units to the left, so we will use (t+11) in our function definition.

Since the period is 365 days, we will use (2π/365) as the scale factor for the argument of the cosine function.

Our formula is ...

  L(t) = 727.775 -51.875cos(2π(t +11)/365)

__

b) L(55) ≈ 705.93 minutes

8 0
3 years ago
Bryan jogged the same distance each day for 7 days. He ran a total of 22.4 miles. The equation 7d=22.4 can be used to find the d
Maru [420]
I hope this helps you




if he jogged 22.4 miles in 7 days



he jogged ? miles in 1 day




?.7=22.4


?=22.4/7



?=3.2
6 0
3 years ago
when deciding how much money to set aside for a new car, a good rule of thumb to follow is to budget about one-fifth of your mon
joja [24]
3750(0.20)=$750
1/5 as a percent is 20% and as a fraction it is 0.20
5 0
3 years ago
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