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2 years ago

The surface area of a cone with radius r units and slant height s units is shown below:

Mathematics

1 answer:

Diano4ka-milaya [45]2 years ago

7 0

Step-by-step explanation:

part A:

$Area_{_{surface}}=3.14*(3*5+3^2);$

part B:

$Area_{_{surface}}=3.14*(15+9)=3.14*24=75.36[units^2].$

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Write y=-3x^2+12x-21 in vertex form

riadik2000 [5.3K]

Complete the square:
y = 3x^2 - 12x + 4 
y = 3(x^2 - 4x) + 4 
y = 3(x^2 - 4x + 4 - 4) + 4 
y = 3(x^2 - 4x + 4) - 12 + 4 
y = 3(x - 2)^2 - 8

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3 years ago

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From a population of 200,000,000 elements, the standard deviation is known to be 14. A sample of 49 elements is selected. It is

Talja [164]

Answer:

The standard error of the mean = 2

Step-by-step explanation:

Given that:

The standard deviation σ = 14

The sample size n = 49

The sample mean $\overline x$ = 56

The formula for calculating the standard error can be expressed as:

$S.E = \dfrac{\sigma}{\sqrt{n}}$

$S.E = \dfrac{14}{\sqrt{49}}$

$S.E = \dfrac{14}{7}$

S.E = 2

Therefore, the standard error of the mean = 2

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3 years ago

Which equation matches the given points? (0, 7.6), (1, 6.2), (2, 4.8), (3, 3.4), (4,2)

Cerrena [4.2K]

The equation that matches the given points is g(x) = -1.4x + 7.6

The standard form of a linear equation is expressed as $g(x)=mx + b$

m is the slope of the line

b is the y-intercept:

Using the coordinate points (3, 3.4), (4,2)

$m=\frac{2-3.4}{4-3}\\m=\frac{-1.4}{1}\\m=-1.4$

Substitute m = -1.4 and the coordinate (4, 2) into the formula:

$2=4(-1.4)+b\\2=-5.6+b\\b=2+5.6\\b=7.6$

Get the required equation:

$g(x)=mx+b\\g(x)=-1.4x+7.6$

Hence the equation that matches the given points is g(x) = -1.4x + 7.6

Learn more on equation of a line here; brainly.com/question/9351428

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3 years ago

What is the equation of the absolute function shown in the graph?

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Answer is 6|x+2|+2

Please check the attached image of answer to clear the doubt.

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3 years ago

2.50+0.50=21 help meeeeeeeeeee

Rzqust [24]

Answer:

You are missing some of the equation my dude

Step-by-step explanation:

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3 years ago

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