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steposvetlana [31]
3 years ago
6

Mark tossed six balls

Mathematics
2 answers:
Ivanshal [37]3 years ago
8 0
Six balls fell back down
Yuri [45]3 years ago
7 0
Mark tossed for 3 3 3= 6
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In the following proportion, what does x equal? A. 4.6 B. 5.4 C. 6.1 D. 6.8
kotykmax [81]

\frac{x}{8} = \frac{23}{40}

(cross multiply)

184 = 40x

x = 4.6 <=== answer

8 0
3 years ago
Read 2 more answers
Help please ASAP
sergejj [24]

Answer:

the answer is d 123,984

Step-by-step explanation:

123 x 1008 is  123984

6 0
3 years ago
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. Ho
sleet_krkn [62]

Answer:

We need at least 271 transactions

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}}

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.

Minimum sample size within five percentage points.

n when M = 0.05.

We dont know the proportion, so we use \pi = 0.5, which would be the proportion requiring the largest sample size

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

0.05 = 1.645\sqrt{\frac{0.5*0.5}{n}}

\0.05\sqrt{n} = 1.645*0.5

\sqrt{n} = 16.45

(\sqrt{n})^{2} = (16.45)^{2}

n = 270.6

Rouding up

We need at least 271 transactions

4 0
3 years ago
Solve for x.<br> 2x^2+12x+11-(x+4)^2
Andru [333]
2x² + 12x + 11 - (x - 4)²
2x² + 12x + 11 - 1(x - 4)²
2x² + 12x + 11 - 1(x - 4)(x - 4)
2x² + 12x + 11 - 1(x(x - 4) - 4(x - 4))
2x² + 12x + 11 - 1(x(x) - x(4) - 4(x) + 4(4))
2x² + 12x + 11 - 1(x² - 4x - 4x + 16)
2x² + 12x + 11 - 1(x² - 8x + 16)
2x² + 12x + 11 + 1(x²) + 1(8x) - 1(16)
2x² + 12x + 11 + x² + 8x - 16
2x² + x² + 12x + 8x + 11 - 16
3x² + 20x - 5
5 0
3 years ago
emliy is thinking of a number which she calls n she find 1/4 of the number and then subtracts 3. write an expressions that repre
olganol [36]

Answer:

1/4 n - 3.

Hope this helps, sorry if it doesn't.

3 0
3 years ago
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