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2 years ago

If f(x)=3x^2 and g(x)=4x+2 what is the value of (f+g)(-1)

Mathematics

1 answer:

Dmitry [639]2 years ago

4 0

Answer:

Step-by-step explanation:

first, you have to combine the two equations.

f(x)+ g(x)

3x^2 +4x+2= (that haha)

now substitute -1 for x

3(-1)^2 +4(-1)+2

(3×1) +(-4)+2

3-4+2

HOPE IT HELPS YOU :)

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Calculate the sample standard deviation of data from Question 1<br> 76,45,64,80,92

mash [69]

Answer:

$S.D = 15.98$

Step-by-step explanation:

Given: 76,45,64,80,92

Required: Determine the standard deviation

We start by calculating the mean

$Mean = \frac {\sum x}{n}$

Where x-> 76,45,64,80,92 and n = 5

$Mean = \frac {76+45+64+80+92}{5}$

$Mean = \frac{357}{5}$

$Mean = 71.4$

Subtract Mean (71.4) from each of the given data

$76 - 71.4 = 4.6\\45 - 71.4 = -26.5\\64 - 71.4 = -7.4\\80 - 71.4 = 8.6\\92 - 71.4 = 20.6$

Determine the absolute value of the above result

$|4.6| = 4.6\\|-26.5| = 26.5\\|-7.4| = 7.4\\|8.6| = 8.6\\|20.6| = 20.6$

Square Individual Result

$4.6^2 = 21.16 \\26.5^2 = 702.25\\7.4^2 = 54.76\\8.6^2 = 73.96\\20.6^2 = 424.36$

Calculate the mean of the above result to give the variance

$Mean = \frac {\sum x}{n}$

$Mean = \frac{21.16 + 702.25 + 54.76 + 73.96 + 424.36}{5}\\Mean = \frac{1276.49}{5}\\Mean = 255.298$

Hence, Variance = 255.298

Standard Deviation is calculated by $\sqrt{Var}$

$SD = \sqrt{255.298}$

$S.D = 15.9780474402$

$S.D = 15.98 (Approximated)$

6 0

3 years ago

Solve for x:

Keith_Richards [23]

It’s C because if you type it In this is what it comes out as

7 0

3 years ago

Read 2 more answers

Convert 2.5 kg into gram

finlep [7]

Answer:

2500 grams

Step-by-step explanation:

1kg=1000g

2.5kg=1000×2.5

=2500

5 0

2 years ago

Read 2 more answers

Helppp I just need it to be explained. #7

IceJOKER [234]

#7 is the easiest one.

a + bi = -9 + 4i

see the expression on either side matches up so..
a = -9 and b = 4

5 0

3 years ago

I feel so d u m b right now asking so many questions T^T

Alexus [3.1K]

Heyy it’s 1:50! you would put the original two numbers in a ratio 16:800 divide by 8 and get 2:100 then divide by 2 and get 1:50!

5 0

3 years ago

Read 2 more answers