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Kryger [21]
3 years ago
10

A new car loses 18% of its value in a year. At a year old, it is worth

Mathematics
1 answer:
kirill115 [55]3 years ago
5 0

Answer:

11,155

Step-by-step explanation:

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Help solve equations by completing the square
Allushta [10]

x^2+10x+22=13\\x^2+10x+22-13=0\\x^2+10x+9=0\\

Now completing the square.

(x^2+10x)+9=0\\(x^2+10x+25)+9-25=0\\(x+5)^2-16=0\\(x+5)^2=16

(x+5)² = 16 is the rewritten equation... For first question btw.

For the solutions to the equation -

x+5=\sqrt{16},-\sqrt{16} \\x+5=4,-4\\x=4-5,-4-5\\x=-1,-9

x = -1,-9 is the solution, for the second question.

5 0
3 years ago
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

Thus, we can say that every element of Y is in X, but X possesses more elements. Thus, Y ⊂ X.

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
(e) The cost of building the ship was $153 000 000. Write 153 000 000 in standard form.​
Ostrovityanka [42]

Answer:

1.53 x 10 8

Step-by-step explanation: the 8 is small i just didnt know how to make it small lol

4 0
1 year ago
What does this math problem mean |3x|=9
Vladimir79 [104]

Answer:

idkkkk lol

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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Deffense [45]

Answer:

The formula for calculating mean is summation x/n

There fore

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-7

3

2

-6

-4

8

-2

1

The answer is -4 which A

4

7 0
2 years ago
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