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diamong [38]
3 years ago
8

Which graph represent y= x2 - 2x -3

Mathematics
1 answer:
Stella [2.4K]3 years ago
4 0
There is no image but I am happy to help if you attach one
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Solve by substitution y=x+4, y=2x+5
Amiraneli [1.4K]
X+4=2x+5
-1=x
hope this helps
4 0
2 years ago
I need an answer asap if you know thanks it is worth a lot of points your welcome
Snowcat [4.5K]
A. multiplication is your answer.
6 0
3 years ago
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On a multiple-choice test. Abby randomly guesses on all seven questions. Each question
Murrr4er [49]

Answer:

0.173 probability that she gets exactly three questions correct.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either she guesses the correct answer, or she does not. The probability of guessing the correct answer for a question is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Seven questions:

This means that n = 7

Each question has four choices.

Abby guesses, which means that p = \frac{1}[4} = 0.25

Find the probability to the nearest thousandth, that Abby gets exactly three questions correct.

This is P(X = 3).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{7,3}.(0.25)^{3}.(0.75)^{4} = 0.173

8 0
3 years ago
2/5x3/4 show your work if you get it right i will give u braniset. if u do for frre points i willl delete it
maw [93]
2x3
—— = 6/20 = 3/10
5x4
3 0
3 years ago
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The unit rate of 15 degrees in 2 hours
Neporo4naja [7]
Solution: 7.5 Degrees per hour

Reasoning: 15/2 is equal to 7 1/2 or 7.5
5 0
2 years ago
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