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3 years ago

Model the expression -3 3/4 + 1/2 on a number line

Mathematics

2 answers:

Zinaida [17]3 years ago

5 0

It would be 4 because I really don’t know

KiRa [710]3 years ago

4 0

Answer:

Step-by-step explanation:

One way in which to tackle this would be to convert that '1/2' to '2/4.' Then we have the expression:

-3 3/4 + 2/4

Combining these two numbers yields -3 1/4. x = -3 1/4 is to be plotted on the number line.

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Answer + Step-by-step explanation:

1) The probability of getting 2 white balls is equal to:

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2) the probability of getting 2 white balls is equal to:

$=C^{2}_{5}\times (\frac{8}{20} \times \frac{7}{19}) \times (\frac{12}{18} \times \frac{11}{17} \times \frac{10}{16})\\=0.397316821465$

3) The probability of getting at least 72 white balls is:

$=C^{72}_{150}\times \left( \frac{8}{20} \right)^{72} \times \left( \frac{7}{20} \right)^{78} +C^{73}_{150}\times \left( \frac{8}{20} \right)^{73} \times \left( \frac{7}{20} \right)^{77} + \cdots +C^{149}_{150}\times \left( \frac{8}{20} \right)^{149} \times \left( \frac{7}{20} \right)^{1} +\left( \frac{8}{20} \right)^{150}$

$=\sum^{150}_{k=72} [C^{k}_{150}\times \left( \frac{8}{15} \right)^{k} \times \left( \frac{7}{15} \right)^{150-k}]$

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