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muminat
3 years ago
10

Pre-cal help!! (See Attachment)

Mathematics
1 answer:
MAVERICK [17]3 years ago
7 0
2cos(x) + 1 = 0

cos(x) = -\frac{1}{2}

The basic angle for 1/2 is 60°, and cosines are negative in the first and third quadrant.

So, you take 180° - 60° = 120° to get the angle in the first quadrant, and 180° + 60° = 240° to get the angle in the third quadrant.

Since only 120° is an option, the answer is B.
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39.6 x 5.20 show your work traditional method
fgiga [73]

Answer:


We have to multiply

⇒39.6 x 5.20 [ Using traditional method]

Traditional method: used by humans when they learnt counting and when fraction came into existence.Suppose something(Area of a field) is divided into parts and another thing(Amount of water used in irrigating the field) is divided into parts and then we have to multiply these two numbers.


3 0
3 years ago
Milton got a paperweight like the one shown below. He needs to fill it with sand to give it weight.
Rashid [163]
2x2x2 = 8

4 x 2 x 2 = 16

16+8 = 24

Answer is A
4 0
3 years ago
Read 2 more answers
Which equation represents the line that passes through the point (4, -5) and is perpendicular to the line x + 2y = 5?
Lerok [7]

Answer:

y = 2x - 13

Step-by-step explanation:

Equation of a line is y = mx + c, m is the gradient and c is the intercept

The line passes through points 4 and -5, x is 4 and y is -5

-5 = 4m + c

When two lines are perpendicular, the products of their gradients are equal to -1, m1 * m2 = -1

x + 2y = 5

2y = -x + 5

y = (-1/2 * x) + 5

therefore m = -1/2

m1 * m2 = -1

m * -1/2 = -1

-m = -2 , therefore m = 2

-5 = 4 * 2 + c

c = -5 - 8, which is -13

Therefore the equation for the line is

y = 2x - 13

7 0
3 years ago
Given f(x) = -3x - 2 find the foloeing
emmainna [20.7K]

Answer:

f(x) = -3x - 2

F(0)=-2

F(1)= -5

Domain R

Range R

Step-by-step explanation:

6 0
3 years ago
Pls help me!!! I'm timed
Aleonysh [2.5K]
The domain is the x-axis and the range is the y-axis.

So the range of the function would be the Y values given.

So the range would be (3, 6, 9, 12, 15).
3 0
3 years ago
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