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lara31 [8.8K]
3 years ago
13

If f(x) = 1/2x - 3 and g(x) = 2x + 5 , what is the value of (g • f)(4)

Mathematics
1 answer:
scoray [572]3 years ago
3 0

Answer:

3

Step-by-step explanation:

(g.f)(x) = g(f(x)) = 2( \frac{1}{2} x - 3) + 5 \\  = x - 6 + 5 = x - 1 \\ then \\ (g.f)(4) = 4 - 1 = 3

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Determine the quadrant when the terminal side of the angle lies according to the following conditions: cos (t) < 0, csc (t) &
Bess [88]

Answer:

The angle is in the second quadrant.

Step-by-step explanation:

The cosecant of an angle is the same as the reciprocal of the sine of that angle. In other words, as long as \sin (t) \ne 0,

\displaystyle \csc t = \frac{1}{\sin t}.

Therefore, \csc(t) > 0 is equivalent to \sin (t) > 0.

Consider a unit circle centered at the origin. If the terminal side of angle t intersects the unit circle at point (x,\, y), then

  • \cos (t) = x, and
  • \sin(t) = y.

For angle t,

  • x = \cos(t) < 0, meaning that the intersection is to the left of the y-axis.
  • y = \sin(t) > 0, meaning that the intersection is above the x-axis.

In other words, this intersection is above and to the left of the origin. That corresponds to second quadrant of the cartesian plane.

6 0
2 years ago
Which of the following statements are not true?
lubasha [3.4K]
That one correct so yes um cause the app said answer must be above 20 characters

6 0
3 years ago
A bag contains 816 White market 14 red marbles and 10 Green marbles a marble is drawn at random from the bag what is the probabi
AveGali [126]

the answer that it is not going to be white is 1

3 0
2 years ago
Find the value of x
raketka [301]

Answer:

65

Step-by-step explanation:

remember a TRIANGLE always have a 180 degrees total angle,

so 45+70=115

180-115=65

5 0
2 years ago
Find the exact value of cos(arcsin(1/4)). For full credit, explain your reasoning.
Westkost [7]
First way
arcsin(1/4) means that 1/4 sin of the angle.

sin(α)=1/4
sin²α+cos²α=1
(1/4)²+cos²α=1
cos²α=1-1/16 =15/16
cosα=+/-(√15)/4

<span>Second way
</span>
sin(α)=1/4 =opposite leg/hipotenuse
cos(α)=adjacent leg/hypothenuse
adjacent leg =√(hypotenuse²- Opposite²)=√(16-1)=√15
cosα=+/-√15/4

For one value of sinα, possible 2 values of cosα.

5 0
2 years ago
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