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2 years ago

What is the value of f(3) in the function below?

Mathematics

2 answers:

Ostrovityanka [42]2 years ago

5 0

Answer:

A. 8

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Functions
Function Notation

Step-by-step explanation:

Step 1: Define

Identify

f(x) = 2ˣ

Step 2: Evaluate

Substitute in x [Function f(x)]: f(3) = 2³
Evaluate: f(3) = 8

tamaranim1 [39]2 years ago

5 0

Answer:

it's 8

Reason:

substitute x=3 into the function....it'd be 2³, which is 8

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Consider a population list x, with a CV= 10%. A second population list, y, has a CV= 20%. The linear regression of y on x is y =

ch4aika [34]

Answer:

The correlation coefficient 0.5 depicts that there is moderate positive correlation between y and x.

Step-by-step explanation:

The linear regression equation is

y= a+bx

The given linear equation is

y= 10x

Here, slope=b=10 and intercept=a=0.

From above equation,

ybar=10xbar

We are given that CVx=0.1 and CVy=0.2

where CV=(standard deviation/mean)*100

We know that

b=r(Sy/Sx)

Multiplying by xbar/ybar on both sides

(xbar/ybar)b=r(Sy/Sx)(xbar/ybar)

(xbar/ybar)b=r[(Sy/ybar)/(Sx/xbar))]

(xbar/ybar)b=r[CVy/CVx]

As CVy/CVx=(Sy/ybar)*100/(Sx/xbar)*100=(Sy/ybar)/(Sx/xbar).

By putting ybar=10xbar, b=10, CVx=0.1 and CVy=0.2.

(xbar/10xbar)10=r(0.2/0.1)

1=r(0.2/0.1)

1=r(2)

r=0.5

There is moderate positive correlation between y and x.

6 0

2 years ago

3) The total cost is a function of how many pounds of candy that I buy.

Ray Of Light [21]

Total cost independent variable

Pounds of candy dependent variable

Step-by-step explanation:

A variable is a condition that is liable to change. Most experimental hypothesis use variables to draw up suitable statements to test.

An independent variable is that variable that does not rely on another variable. It induces the change or variation in another variable. In the statement above, the total cost is the independent variable.
The other variable which is the effect resulting from the variation of the independent variable is the dependent variable. Here it is the number of pounds of the candy that changes when total cost varies.

Learn more:

Experiment brainly.com/question/1621519

#learnwithBrainly

8 0

3 years ago

What is the surface area of the ice cream

galina1969 [7]

Answer:

$13194.7\ mm^2$

Step-by-step explanation:

The total surface area of a cone is given by:

Surface area = $\pi r(r+\sqrt{h^2+r^2} )$

where r is the radius of the cone, h is the height of the cone, l is the length of the cone = $\sqrt{h^2+r^2}$

Given that h = 136 mm, r = 60 mm /2 = 30 mm, l = 140 mm. Also the top of the cone is not included in the surface area, hence the surface area becomes:

$Surface \ area=\pi r(\sqrt{h^2+r^2} )=\pi rl\\\\Surface \ area=\pi (30\ mm)(140\ mm)=13194.7\ mm^2$

3 0

3 years ago

What is the equation of this line? y=3/2x −2 y=−2x+3/2 y=−2x+2/3 y=2/3x −2

podryga [215]

The answer is the last one, y = 2/3 -2
Use the rise over run strategy on linear functions such as this one

7 0

2 years ago

18. Is the relation {(3, 5), (–4, 5), (–5, 0), (1, 1), (4, 0)} a function? Explain. Type your answer below.

NemiM [27]

It is a function because all the inputs (x values) have one output (y value).

For something to be a function, inputs can only have ONE output, if an input has multiple outputs, it is not a function.

If different inputs have the same output, it is still a function because they don't have the same input value

5 0

3 years ago