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anzhelika [568]
3 years ago
9

Use distributive property. 4 x 63 = ??

Mathematics
1 answer:
aleksandrvk [35]3 years ago
4 0

Answer:

(4) * (63)

252

(* ̄3 ̄)╭

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NNEED HELP!! GEETSS BRAINLIEST**
sergejj [24]

Answer:

D. y=3\cos \left(\dfrac{4}{3}x-2\pi\right)+2

Step-by-step explanation:

The period of the functions y=\cos x,\ y=\sin x is 2\pi.

The period of the function y=a\cos (kx+b),\ y=a\sin(kx+b) is ALWAYS \dfrac{2\pi}{k}

In your case, you have function y=-3\sin \left(\dfrac{2}{3}x-2\pi \right)+2 and this function has the period

\dfrac{2\pi}{\dfrac{2}{3}}=3\pi.

You need to find the function that will have the period that is half of 3\pi, so

\dfrac{3\pi}{2}=\dfrac{2\pi}{k}\\ \\3k=4\\ \\k=\dfrac{4}{3}.

So, correct choice is

y=3\cos \left(\dfrac{4}{3}x-2\pi\right)+2

7 0
3 years ago
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According to a​ survey, 60 ​% of the residents of a city oppose a downtown casino. Of these 60 ​% about 8 out of 10 strongly opp
katrin [286]

Answer:

(a) 0.48

(b) 0.20

(c) it is not unusual for a radomly selected resident to oppose the casino and strongly oppose the​ casino.

Step-by-step explanation:

​(a) Find the probability that a randomly selected resident opposes the casino and strongly opposes the casino. ​

The probability that a radomly selected resident opposes the casino and strongly opposes the cassino is the product of the two probabilities, that a resident opposes the casino and that it strongly opposes the casino (once it is in the first group) as it is shown below.

Use this notation:

  • Probability that a radomly selected resident opposes the casino: P(A)

  • Probability that a resident who opposes the casino strongly opposes it: P(B/A), because it is the probability of event B given the event A

i) Determine the <em>probability that a radomly selected resident opposes the casino</em>, P(A)

Probability = number of favorable outcomes / number of possible outcomes

  • P(A) is <em>given as 60%</em>, which in decimal form is 0.60

ii) Next, determine,the <em>probability that a resident who opposes the casino strongly opposes it</em>, P(B/A):

  • It is given as 8 out of 10 ⇒ P(B/A) = 8/10

iii) You want the probability of both events, which is the joint probability or  intersection: P(A∩B).

So, you can use the definition of conditional probability:

  • P(B/A) = P(A∩B) / P(A)

iv) From which you can solve for P(A∩B)

  • P(A∩B) = P(B/A)×P(A) =  (8/10)×(0.60) = 0.48

(b) Find the probability that a randomly selected resident who opposes the casino does not strongly oppose the casino.

In this case, you just want the complement of the probability that <em>a radomly selected resident who opposes the casino does strongly oppose the casino</em>, which is 1 - P(B/A) = 1 - 8/10 = 1 - 0.8 = 0.2.

​(c) Would it be unusual for a randomly selected resident to oppose the casino and strongly oppose the​ casino?

You are being asked about the joint probability (PA∩B), which you found in the part (a) and it is 0.48.

That is almost 0.50 or half of the population, so you conclude it is not unusual for a radomly selected resident to oppose the casino and strongly oppose the​ casino.

8 0
3 years ago
Why can't <img src="https://tex.z-dn.net/?f=x%5E2-5x-1" id="TexFormula1" title="x^2-5x-1" alt="x^2-5x-1" align="absmiddle" class
7nadin3 [17]

Answer:

Step-by-step explanation:

Discussion.

Not directly. But the quadratic formula can do it. But that's not your question.

the factors you get must contain the factors for 1 which are 1 and - 1

These factors must add to - 5. There's no way that will happen with 1 and - 1 and you would be creative math if you tried to say that you could make one of the factors (x -1-1-1-1-1-1). That creates a whole new question.

5 0
1 year ago
(4p2 - 5p - 4) + (5p2 - 4-2p)​
Rasek [7]

Answer:

9p^2 - 7p - 8

Hope this helps! Can I have BRAINLIEST please?

5 0
3 years ago
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Hailey bought 3 pounds of apples for $7.70. How much did she pay per pound?
7nadin3 [17]
2.57 is the anwser. it comes out to be 2.56666667 which woukd round up to 2.57
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3 years ago
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