What is the value of z?

Which relation defined by a set of ordered pairs is not a function?

IRINA_888 [86]

The answer is: [C]:
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"{(1, –1), (2, –2), (0, 0), (1, 1), (2, 2)} " {(1, –1), (2, –2), (0, 0), (1, 1), (2, 2)}" .
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This set of ordered pairs is NOT a function because their is one x-coordinate in this set that has multiple y-coordinates;
specifically: "(1, -1)" ; and "(1, 1)".
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All of the other answer choices given are functions.
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3 0

4 years ago

Grace is comparing cell phone plans. A prepaid phone plan costs $0.20 per minute and has no monthly fee. A contracted phone plan

Wittaler [7]

The answer would be A. or the first one.

8 0

4 years ago

Read 2 more answers

According to insurance records, a car with a certain protection system will be recovered 87% of the time. If 600 stolen cars are

White raven [17]

Answer:

The mean and standard deviation of the number of cars recovered after being stolen is 522 and 8.24 respectively.

Step-by-step explanation:

We are given that according to insurance records, a car with a certain protection system will be recovered 87% of the time.

Also, 600 stolen cars are randomly selected.

Let X = Number of cars recovered after being stolen

The above situation can be represented through binomial distribution;

$P(X=r)=\binom{n}{r}\times p^{r} \times (1-p)^{n-r} ;x=01,2,3,......$

where, n = number of trials = 600 cars

r = number of success

p = probability of success which in our question is the probability

that car with a certain protection system will be recovered,

i.e. p = 87%.

So, X ~ Binom(n = 600, p = 0.87)

Now, the mean of X, E(X) = $n \times p$

= $600 \times 0.87$ = 522

Also, the standard deviation of X, S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{600 \times 0.87 \times (1-0.87)}$

= 8.24

3 0

3 years ago

Help please!! What is the answer?

Doss [256]

The area formula for a parallelogram is the same as it is for a square or a rectangle. It's A = b*h. They give you the area and the height, and x is part of the radicand for the base. Set it up like this: $42= \sqrt{x+6} *7$ . Divide both sides by 7 to get $6= \sqrt{x+6}$ . Now, the opposite of a square root is squaring, so let's undo that square root by squaring. But because this is an equation, if you square the right you also have to square the left. $(6) ^{2}=( \sqrt{x+6}) ^{2}$ . Squaring that square root undoes the square root, so now what we have is 36 = 6 + x, and 30 = x. There you go!

6 0

3 years ago

Robert wants to put lights around the edge of his deck. The deck is 46 feet long and 23 feet wide. How many yards of lights does

Korolek [52]

46 yards is the answer

5 0

3 years ago