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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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A city Council consist of six democrats and eight Republicans if a committee of six people is selected find the probability of s
olga nikolaevna [1]

Answer:

The probability of selecting three Democrats and two Republicans is 0.349

Step-by-step explanation:

Given:

The Number of Democrats = 6

The Number of Republicans = 8

To Find:

Probability of selecting 2 Democrats and 4 Republicans. = ?

Solution:

we have to select a committee of 6 people

Now the probability of selecting 2 Democrats and 4 Republicans.

 =>\frac{\mathrm{P}(\text { Selecting two Democrats }) \cdot \mathrm{P}(\text { Selecting four Republicans })}{\mathrm{P}(\text { Selecting } 6 \text { member from total } 14)}

=>\frac{C(6,2) \cdot C(8,4)}{C(14,6)}

=>\frac{ 6 C_{2 } \cdot 8 C_{4}}{14 C_{6}}

=>\frac{15\cdot 70}{3003}

=>\frac{1050}{3003}

=>0.349

3 0
4 years ago
You spend a $20 per turn on a fair game to win $50 for each win. you lose the first round but win the next two rounds.
Brums [2.3K]

Answer:

70

Step-by-step explanation:

ok, so since you want to find out what the profit is, first you take the times you won and multiply the amount you got for winning so 50*2=100. now that you have 100 you take the money you spent and multiply it by the number of times you played the game so 20*3=30. now that you have those you have everything you need to finish the question. you take the amount you spent per play (30) and subtract it from what you won (100). 100-30=70

3 0
3 years ago
Read 2 more answers
Solve liner equation for they variable<br> 3x-5(x+6)=-2x-2(5+10)
Dvinal [7]

Answer:

all numbers

Step-by-step explanation:

3x - 5(x + 6) = -2x -2(5 + 10)

Distribute on both sides.

3x - 5x - 30 = -2x - 10 - 20

Add 2x to both sides.

-2x - 30 = -2x - 30

-30 = -30

Since we get a true statement after only doing legal steps to solve the equation, the equation has an infinite number of solutions.

Answer: all numbers

4 0
3 years ago
Round each number to the nearest tenth.
cupoosta [38]
B,
the exact answer is 84.96, so most likely rounded,

RULES:
5 or above, shove it up.
4 or below, leave it.

9 is higher than 5, obviously.

So, B is the answer.

~MisterMistyEyed
3 0
4 years ago
Read 2 more answers
The store,s rectangular floor is 42 meters long and 39 meters wide. How many square meters of flooring do they need? Use estimat
Dmitrij [34]
42x39=1,638

Remember that the formula for finding the area of a square is base x high

So the answer is 1,638 square meters
4 0
4 years ago
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