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3 years ago

How do you solve algebraically 8x^2=18

1 answer:

5 0

That would be
$x = + \frac{ \sqrt[]{3} }{ \sqrt[]{2} }$
BTW the plus sign is supposed to have this sign underneath it _
Good luck.

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PRACTICE ANOTHER The administration of a large university wants to take a random sample to measure student opinion of a new food

Reil [10]

Answer:

81 samples

Step-by-step explanation:

According to the empirical rule :

Possible values of the sample mean is within 3 standard deviations of the population mean :

μ ± 3 sd(x) ; sd(x) = standard deviation of sampling distribution.

3 * sd(x) = 1

sd(x) = 1/3

Recall:

Standard deviation of sampling distribution, sd(x)

sd(x) = σ / sqrt(n)

1/3 = 3 / sqrt(n)

Square both sides

1/9 = 9/n

Cross multiply :

n * 1 = 9 * 9

n = 81

3 0

2 years ago

Given that a randomly chosen quadrilateral has four right angles, what is the probability that the quadrilateral also has four e

Alexxx [7]

Answer:

0.25

Step-by-step explanation:

This is the question on conditional probability

Let A - the quadrilateral has four right angles

B - the quadrilateral has four equal side lengths

Required probability = P(B/A)

By definition of continuous probability

$P(B/A) = \frac{P(AB)}{P(A)}$

$P(AB) = \frac{2}{20} =0.10$

P(A) = $\frac{8}{20} =0.4$

Hence given probability = $\frac{0.1}{0.4} =0.25$

7 0

3 years ago

Suppose a poker hand contains seven cards rather than five. Compute the probabilities of the following poker hands: (a) a seven-

geniusboy [140]

Answer:

a) 0.00031

b) 0.0017

c) 0.31

d) 0.00018

Step-by-step explanation:

attached below is the detailed solution

Total number of 7-poker cards are 52P7 = 133784560

A) Determine the probabilities of Seven-card straight

probability of seven-card straight = 0.00031

B) Determine the probability of four cards of one rank and three of a different rank

P( four cards of one rank and three of different rank ) = 0.0017

C) Determine probability of three cards of one rank and two cards of each two different ranks

P( three cards one rank and two cards of two different ranks ) = 0.31

D) Determine probability of two cards of each of three different ranks and a card of a fourth rank

P ( two cards of each of three different ranks and a card of fourth rank ) = 0.00018

8 0

2 years ago

The bowl has a diameter of 10 inches. What is its radius?

Licemer1 [7]

5 because u divide it

7 0

2 years ago

Read 2 more answers

What’s the answer to this problem?

Vinil7 [7]

×=23

:) :) :) :) :););) ;););)

5 0

2 years ago