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Alex Ar [27]
2 years ago
14

Please help. this is a final exam question ​

Mathematics
1 answer:
Varvara68 [4.7K]2 years ago
8 0

Step-by-step explanation:

Tanx =opp/adj

=50/42 =55. 5°

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Tell whether the ordered pair is a solution of the given system:
dexar [7]

Answer:

yes the ordered pair is a solution

Step-by-step explanation:

(x, y) = (0,0)

y < -x + 3

0 < - (0) + 3  

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true, ordered pair is a solution

7 0
3 years ago
Find the circumference of a circle whose radius is 15.4cm 
LenaWriter [7]
r=15,4\ cm\\C=2\cdot\ \pi\ \cdot\ r\\C=2\cdot\ \pi\ \cdot\ 15,4\ cm\\C=30,8\ \pi\ cm

\pi\approx\ 3,14

C=30,8\ \cdot\ 3,14\ cm\\C=96,712\ cm


6 0
3 years ago
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Consider the following portion of an electric circuit with three relays. Current will flow from point a to point b if there is a
Svetradugi [14.3K]

Answer:

0.9009

Step-by-step explanation:

Let X be the event that Current will flow

Let Y be the event that the first relay which is 1 is closed

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Thus, we can say that;

P(X ∩ Y) = P(Y)

Thus, given that current flowed, the probability that relay 1 functioned will be expressed as;

P(Y | X) = (P(Y ∩ X))/P(X)

From earlier, we saw that P(X ∩ Y) = P(Y). Thus;

P(Y | X) = P(Y)/P(X)

From the question, P(Y) = 0.9

Since there are 3 relays, then we have;

P(X) = 1 - 0.1³ = 0.999

Thus;

P(Y | X) = 0.9/0.999

P(Y | X) = 0.9009

4 0
2 years ago
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Answer:

(C.

I THINK-

Step-by-step explanation:

5 0
2 years ago
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cestrela7 [59]

We want the final coordinate of K to become (-3,1). If you reflect across the y-axis, you transform

(x,y)\mapsto(-x,y)

So, we need to move K to (3,1), and then reflect it across the y-axis. Since K starts at (-1,4), we have to move it 4 units to the right and 3 units down.

4 0
2 years ago
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