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3 years ago

Evaluate the expressiin when a=6, b=3, and c=2: c(b+a)-a= please help

Mathematics

1 answer:

Setler [38]3 years ago

8 0

Answer:

$\huge{ \fbox{ \tt{12}}}$

Step-by-step explanation:

$\underline{ \sf{Given}} : \sf a=6, \: b=3 \: and \: c=2$

$\underline{ \sf{To \: find }} : \sf{Value \: of \: the \: given \: expression}$

$\underline{ \underline{ \mathfrak{Let's \: solve}}} :$

$\bigstar{ \tt{ \: c \: ( \: b \: + \: a \: ) - \: a}}$

$\text{Step \: 1 \: } :$ Plug the values of a , b and c

$\mapsto{ \tt{ \: 2 \: ( \: 3 \: + \: 6 \: ) \: - \: 6}}$

$\text{Step \: 2} : \sf{ \: Add \: the \: numbers : 6 \: and \: 3}$

$\mapsto{ \sf{ \: 2 \: * \: 9 \: - \: 6 \: }}$

$\text{Step \: 3 \: } : \sf{ \: Multiply \: the \: numbers : 9 \: and \: 2}$

$\mapsto{ \sf{18 - 6}}$

$\text{Step \: 4 \:} : \sf{Subtract \: 6 \: from \: 18}$

$\mapsto{ \sf{ \: 12}}$

Note : Just follow the PEMDAS rule ( See attached picture )

Hope I helped!

Best regards! :D

~ $\sf{TheAnimeGirl}$

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A publication released the results of a study of the evolution of a certain mineral in the Earth's crust. Researchers estimate

san4es73 [151]

Answer:

a) $E(A)=\frac{1+6}{2}=3.5 ppm$

b) $P(2.875$

c) $P(X$

Step-by-step explanation:

If we work with the limits defined from 5 to 10 then part b and c from this question not makes sense. If we work with the limits 1 and 6 all the parts for the question makes sense because if we work with 5 and 10 the only thing that we can find is the expected value $E(A) = \frac{5+10}{2}= 7.5$

Assuming the following correct question : "A publication released the results of a study of the evolution of a certain mineral in the Earth's crust. Researchers estimate that the trace amount of this mineral x in reservoirs follows a uniform distribution ranging between 1 and 6 parts per million"

Solution to the problem

Let A the random variable that represent " amount of the mineral x ". And we know that the distribution of A is given by:

$A\sim Uniform(1 ,6)$

Part a

For this uniform distribution the expected value is given by $E(X) =\frac{a+b}{2}$ where X is the random variable, and a,b represent the limits for the distribution. If we apply this for our case we got:

$E(A)=\frac{1+6}{2}=3.5 ppm$

Part b

For this case we can use the cumulative distribution function for the uniform distribution given by:

$F(X=x)= \frac{x-a}{b-a} = \frac{x}{6-1} =\frac{x-1}{5} , 1 \leq X \leq 6$

And we want this probability: $P(2.875$ Part c

For this case we want this probability:

$P(X$

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3 years ago

What does the consumer price index measure?

juin [17]

The consumer price index or the CPI measures the average change over time in the prices paid by a customer <span>for a market basket of consumer goods and services.</span>

4 0

3 years ago

Read 2 more answers

quester [9]

Answer:

$\large\boxed{C.\ 2x^3-x^2-18x+9}$

Step-by-step explanation:

$\text{Use}\ a^2-b^2=(a-b)(a+b)\qquad(*)\\\\\underbrace{(x-3)(x+3)}_{(*)}(2x-1)=(x^2-3^2)(2x-1)=(x^2-9)(2x-1)\\\\\text{Use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(x^2)(2x)+(x^2)(-1)+(-9)(2x)+(-9)(-1)\\\\=2x^3-x^2-18x+9$