3 years ago

Find the values of these fractions:

Mathematics

1 answer:

VladimirAG [237]3 years ago

3 0

I would say answer 1 honestly good luck

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Write a system of linear equations with -3,9 as its solution

lozanna [386]

Let the variable of the equation be x.

Solution of the equation is given to us, hence,

x = -3 and x = 9

x + 3 = 0 and x - 9 = 0

Multiplying,

(x + 3)(x - 9) = x² - 9x + 3x - 27 = x² - 6x - 27

Hence, the linear equation with solution -3 and 9 is x² - 6x - 27.

4 0

4 years ago

A drunk person is walking on the road. With probability 0.6 he takes a step forward and with probability 0.4 he takes a step bac

Molodets [167]

If a person after 10 steps is at his starting position, then this person takes 5 steps forward and 5 steps backward.

This is a binomial distribution with

probability to take step forward $p=0.6;$
probability to take step backward $q=0.4;$
$n=10.$

Then

$Pr(\text{5 steps forward and 5 steps backward})=C_{10}^5p^5q^5=\\ \\=\dfrac{10!}{5!(10-5)!}\cdot (0.6)^5\cdot (0.4)^5=\dfrac{10!}{5!\cdot 5!}\cdot (0.6\cdot 0.4)^5=\\ \\=\dfrac{5!\cdot 6\cdot 7\cdot 8\cdot 9\cdot 10}{5!\cdot 2\cdot 3\cdot 4\cdot 5}\cdot (0.24)^5=7\cdot2\cdot 9\cdot 2\cdot (0.24)^5=252\cdot (0.24)^5=0.2006581248.$