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Over [174]
3 years ago
15

How many terms are in the expression 4x2 + y - 0 ? help pleaseeee

Mathematics
1 answer:
lawyer [7]3 years ago
6 0

Answer:

3 I did the test to btw

Step-by-step explanation:

did the test

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How many elephants is there if there is 90000 but they multiply by 9% each day. There are 56 days.
aev [14]
4536000 elephants is the answer

5 0
3 years ago
A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll, n=918 and x=521 who said​ "
s2008m [1.1K]

Answer:

B) The margin of error is 0.0269.

C) The confidence interval is (0.5406, 0.5944).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

In the​ poll, n=918 and x=521 who said​ "yes."

This means that n = 918, \pi = \frac{521}{918} = 0.5675

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

B) Identify the value of the margin of error E.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

M = 1.645\sqrt{\frac{0.5675*0.4325}{918}} = 0.0269

The margin of error is 0.0269.

C) construct the confidence interval.

\pi \pm M

So

\pi - M = 0.5675 - 0.0269 = 0.5406

\pi + M = 0.5675 + 0.0269 = 0.5944

The confidence interval is (0.5406, 0.5944).

5 0
3 years ago
WILL GIVE A BRAINLESTTTT<br><br> What is the solution of 3x+8/x-4 &gt;= 0
Blababa [14]
Solution: (-Infinite, -8/3] U (4, Infinite)

Using that a fraction is greater than or equal to zero when the numerator and denominator have the same sign:
a/b>=0. Then we have two cases:
Case 1) If the numerator is positive, the denominator must be positive too (at the same time):
if a>=0 ∩ b>0

Or (U)

Case 2) If the numerator is negative, the denominator must be negative too (at the same time):
if a<=0 ∩ b<0

In this case a=3x+8 and b=x-4, then:

Case 1):
if 3x+8>=0 ∩ x-4>0
Solving for x:
3x+8-8>=0-8 ∩ x-4+4>0+4
3x>=-8 ∩ x>4
3x/3>=-8/3 ∩ x>4
x>=-8/3 ∩ x>4
Solution Case 1: x>4 = (4, Infinite)

Case 2):
if 3x+8<=0 ∩ x-4<0
Solving for x:
3x+8-8<=0-8 ∩ x-4+4<0+4
3x<=-8 ∩ x<4
3x/3<=-8/3 ∩ x<4
x<=-8/3 ∩ x<4
Solution Case 2: x<=-8/3 = (-Infinite, -8/3]

Solution= Solution Case 1 U Solution Case 2
Solution = (4, Infinite) U (-Infinite, -8/3]
Solution: (-Infinite, -8/3] U (4, Infinite)
7 0
3 years ago
Read 2 more answers
Triangle 1 has vertices at (A,B), (C,D), and (E,F). Triangle 2 has vertices at (A,3B), (C,3D), and (E,3F). What can you conclude
MissTica

Answer:

A

Step-by-step explanation:

tell me if corect

4 0
3 years ago
Please help me with number 53.
zimovet [89]
\dfrac{3\sqrt7+1}{\sqrt5}=\dfrac{(3\sqrt7+1)\cdot\sqrt5}{\sqrt5\cdot\sqrt5}=\dfrac{3\sqrt{35}+\sqrt5}{5}
7 0
4 years ago
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