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3 years ago

What is the value of y when x=3 in this equation y=2x+2

Mathematics

1 answer:

Ksenya-84 [330]3 years ago

4 0

Answer:

Step-by-step explanation:

if you substitute 3 for x the equation becomes y=2(3) + 2

using order of operations you multiply 3 by 2 and then add 2 which will give you 8

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An um contains 1 red marble, 7 white marbles and 2 blue marbles. A player randomly

BaLLatris [955]

Answer:

A loss of 1.8$

Step-by-step explanation:

In the bag in this problem, we have:

r = 1 (number of red marbles)

w = 7 (number of white marbles)

b = 2 (number of blue marbles)

n = r + w + b = 1 + 7 + 2 = 10 (number of total marbles)

So, the probabilities of choosing a red, a white or a blue marble are:

$p(r) = \frac{r}{n}=\frac{1}{10}=0.1$ (probability of choosing a red marble)

$p(w)=\frac{w}{n}=\frac{7}{10}=0.7$ (probability of choosing a white marble)

$p(b) = \frac{b}{n}=\frac{2}{10}=0.2$ (probability of choosing a blue marble)

The winning associated to each probability are:

+$5 if the marble is red

-$3 if the marble is white

-$1 if the marble is blue

So the expected winning can be calculated as follows:

$E(X)=p(r) \cdot (+\$5)+p(w) \cdot (-\$3) +p(b)\cdot (-\$1)=\\=(0.1)(+5)+(0.7)(-3)+(0.2)(-1)=-\$1.8$

So, he can expect a loss of 1.8$.

4 0

3 years ago

Please help me find out what the question marks are

quester [9]

Question a

g(x) times $\sqrt{x-5}=\sqrt{x^2-5}$
divide both sides by √(x-5)
$g(x)=\frac{\sqrt{x^2-5}}{\sqrt{x-5}}$
$g(x)=\frac{(\sqrt{x-5})(\sqrt{x^2-5})}{x-5}$
$g(x)=\frac{\sqrt{x^3-5x^2-5x+25}}{x-5}$

question b
$g(x) \space\ times \space\ 1+\frac{1}{x}=x$
divide both sides by 1+1/x
$g(x)=\frac{x}{1+\frac{1}{x}}$
times by x/x
$g(x)=\frac{x^2}{x+1}$

question c
$\frac{1}{x} \space\ times \space\ f(x)=x$
times both sides by x
$f(x)=x^2$

question d
the (f*g)(x) collumn seems to have a domain of only x is greater than or equal to 0?
so maybe we squared the whole thing, ya
wait
ah, ya
basically
$|x|=(\sqrt{x})^2=(\sqrt{x})(\sqrt{x})$
so f(x)=√x

a. $g(x)=\frac{\sqrt{x^3-5x^2-5x+25}}{x-5}$
b. $g(x)=\frac{x^2}{x+1}$
c. $f(x)=x^2$
d. $f(x)=\sqrt{x}$

3 0

4 years ago

Read 2 more answers

Mr.Krabs see's a lamp that is 89% off its original price of 28.50. Bikini Bottom tax rate is 2.3%. How much would Krabs need to

ollegr [7]

$ is your answer 7.2

6 0

3 years ago

Calculate the equation of the line through the points (-1, 1), (4.0), and (24,-4).

Viktor [21]

Good luck to you! Ask if you have any questions.