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Digiron [165]
2 years ago
9

(2 pts.) 9.) Find two equivalent expressions to tan 20° using the cotangent function in degrees.

Mathematics
1 answer:
aniked [119]2 years ago
7 0

tan (u) = a/b = cot (90° – u)

Let u = 20°

Take it from here.

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Please help. loll
tigry1 [53]

Answer:

4 1/3(b-21) im pretty sure

6 0
3 years ago
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A bag contains 7 red marbles, 5 blue marbles and 4 green marbles. If three marbles are drawn out of the bag, what is the probabi
Korvikt [17]

Answer:

<h3>0.063</h3><h2>Step-by-step explanation:</h2>

<h3>probability is defined as the measure of chances of events happening or chances of occurrence.The probability that an event can happen is zero(0)</h3><h3>Probability can be calculated using the formular: number of required outcome all over number of total possible outcome.</h3>

Probability of 3 red = 7/16 x 6/15 x 5/14 = (7)(6)(5)/(16)(15)(14)=

6x5/16x15x2 = 5/16x5= 1/16 = (1/2)(.125) = 0.0625

Probability of 3 reds = 0.0625

round off to thousandths Pr(3R) = 0.063

4 0
2 years ago
Write 2.64 as a percent
irina1246 [14]

Answer:

264%

Step-by-step explanation:

2.64 left 2 decimal places

5 0
3 years ago
Read 2 more answers
Select four statements from the invertible matrix theorem and show that all four statements are true or false
Lelechka [254]

Answer:

A) A is an invertible matrix ( TRUE )

B) A is a row equivalent to the n x n identity matrix ( n = 3 ) ( TRUE )

C ) The equation Ax = 0 has only the trivial solution ( TRUE )

D ) The columns of A form a linearly independent set ( TRUE )

Step-by-step explanation:

Assuming a matrix A

\left[\begin{array}{ccc}1&2&1\\-1&0&3\\4&1&5\end{array}\right]

det A = 1 [ 0 -3 ] +  2 [12 + 5 ]  + 1[-1]

        = -3 + 34 -1 = 30 ≠ 0

THEREFORE  det A = 30 ≠ 0

Attached is the detailed solution of the given statements above

5 0
3 years ago
John has $600 in his checking account at the beginning of the summer. He needs to have at least $250 left in the account at the
Crank

Answer:

The maximum number of weeks that John can withdraw money from his account is 14 weeks.

Step-by-step explanation:

25 x 14 = 350

$600 - $350 = $250

5 0
3 years ago
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