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umka2103 [35]
3 years ago
15

Identify the reference angle

Mathematics
1 answer:
ser-zykov [4K]3 years ago
7 0

Answer:

Below in bold.

Step-by-step explanation:

300 degrees - reference angle is |360 - 300 |= 60 degrees

225 = 225 - 180 = 45 degrees

480 = 480 - 360 = 120 so it is 180 - 120 = 60 degrees.

-210 = |-210 + 180| = 30 degrees.

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,,,,,??,??,,,,,,,,,,,,,,,,
Andre45 [30]

Answer:

  the one real zero is in the interval (-1, 0)

Step-by-step explanation:

Descartes' rule of signs tells you there are 0 or 2 positive real zeros. Changing the signs of the odd-degree terms and applying that rule again tells you there is one negative real zero. At the same time, those coefficients (-3, -5, -5, +7) have a negative sum, so you know ...

  f(-1) = -6

  f(0) = +7

so there is a zero in the interval (-1, 0).

__

You can try a few values between x=0 and x=10 to see what the function does in that part of the graph. You find ...

  f(1) = 10

  f(2) = 21

  f(3) = 58

So, it is safe to conclude that there are no real zeros for x > 0.

The only real zero of f(x) is in the interval (-1, 0).

_____

I like to use a graphing calculator for problems like this.

7 0
3 years ago
Y = x – 6 x = –4 what is the solution to the system of equations? (–8, –4) (–4, –8) (–4, 4) (4, –4
fredd [130]

Answer:

(- 4, - 10 )

Step-by-step explanation:

Given the 2 equations

y = x - 6 → (1)

x = - 4 → (2)

Substitute x = - 4 into (1) for corresponding value of y

y = - 4 - 6 = - 10

Solution is (- 4, - 10 )

4 0
3 years ago
If s(x) = x – 7 and t(x) = 4x2 – x + 3, which expression is equivalent to
Vlada [557]
The answer is If you would like to find the expression that is equivalent to (t*s)(x), you can calculate this using the following steps:

s(x) = x - 7
t(x) = 4x^2 - x + 3

(t*s)(x) = t(s(x)) = t(x - 7) = <span>4(x - 7)^2 - (x - 7) + 3 = 4(x - 7)^2 - x + 7 + 3

The correct result would be </span>4(x – 7)2 – (x – 7) + 3.
6 0
3 years ago
Find the value of x.
dmitriy555 [2]

Answer:

x = 57°

Step-by-step explanation:

The angle not 76° or x° is 180-133 which is 47°. A triangles angles always sum up to 180° so:

76°+47°+x°=180°

123°+x°=180°

x°=57°

6 0
3 years ago
Say that the economy is in a recession, which is causing the value of gold to fall by three percent. If you have gold reserves w
7nadin3 [17]

Answer:

D

Step-by-step explanation:

8590 x 0.03 = 257.70

._.

5 0
2 years ago
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