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4 years ago

What is the value of f(−1) when f(x)=2x+2 ?

Mathematics

2 answers:

Minchanka [31]4 years ago

6 0

the value of f(−1) when f(x)=2x+2

To find the value of f(-1), we plug in -1 for x in the given f(x) = 2x + 2

f(x) = 2x + 2

f(-1) = 2(-1) + 2 = -2 + 2 = 0

so f(-1) = 0

this means when x= -1 the value of y is 0

f(x) is y always

f(-1) means the value of y when x=-1

So we always plug in x value in the place of x to evaluate f(x)

WE got f(-1) = 0

denpristay [2]4 years ago

3 0

<u>Answer:</u>

$f(-1) = 0$

<u>Step-by-step explanation:</u>

We are given a function $f(x)= 2x+2$ .

To solve a problem like this, where we need to find the value of f(x) when the value of x is -1, we just need to substitute the given value of x in the function to get:

$f(x) = 2x+2$

$f(-1)=2(-1)+2$

$f(-1)= -2+2$

$f(-1) = 0$

Therefore, the value of the given function is 0, when x is -1.

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How do u solve 90-2[60÷10]-4

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You follow bedmas (brackets, exponents,division,multiplication,addition,subtraction). First comes the brackets so you do (60 divided by 10) which is 6. You still have (6) which means you have to multiply it by 2. So you get 12. Now you got rid of the brackets so you can solve the rest. 90-12-4= 74.

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On a particular airline, checked bags can weigh no more than 50 pounds. Sally packed 32 pounds of clothes and five identical gif

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Step-by-step explanation:

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3 years ago

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Factor completely 9x2 42x 49. (3x 7)(3x − 7) (9x − 7)(9x − 7) (3x 7)(3x 7) (9x 7)(9x 7).

sweet-ann [11.9K]

Factors of the given expression by splitting middle term of expression $9x^2+42x+49$ will be $(3x+7) and (3x+7)$ .

Given expression is

$9x^2+42x+49$

<h3>What is a factor?</h3>

A factor is a number that divides another number leaving no remainder

After we split 42x into 21x each,

The expression looks like,

$9x^2+21x+21x+49$

$3x(3x+7)+7(3x+7)\\$

Taking 3x+7 as common

$(3x+7) (3x+7)$

So factors will be (3x+7) and (3x+7).

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Factors of the given expression $9x^2+42x+49$ will be $(3x+7) and (3x+7)$ .

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3 years ago

2x - 1 = 3x + 2 <br> 3 6<br> A) -4 <br> B) 2 <br> C) 4 <br> D) 1/4

11111nata11111 [884]

For this case we must find the solution of the following equation:

$2x-1 = 3x + 2$

If we subtract 3x from both sides of the equation we have:

$2x-3x-1 = 2$

Different signs are subtracted and the major sign is placed

$-x-1 = 2$

We add 1 to both sides of the equation:

$-x=2+1\\-x=3$

We multiply by -1 on both sides of the equation:

$x = -3$

So, the solution is $x = -3$

Answer:

$x = -3$

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3 years ago

Which choice below is a boxplot for the following distribution? 67, 66, 64, 62, 60, 56, 54, 50, 46, 42, 41, 40, 40, 38, 35, 21,

luda_lava [24]

Answer:

Option E - Box plot E

Step-by-step explanation:

Given : Data,

67, 66, 64, 62, 60, 56, 54, 50, 46, 42, 41, 40, 40, 38, 35, 21, 19

To find : Which choice below is a boxplot for the following distribution?

Solution :

Step 1- Arranging the data from lowest to highest,

{19,21,35,38,40,40,41,42,46,50,54,56,60,62,64,66,67}

Step 2 - Find the median of the data

As the data is odd numbers so the median is $\frac{n+1}{2}$ th term.

$\frac{n+1}{2}=\frac{17+1}{2}=9th$ term.

9th term is 46

∴ $Q_2=46$

Step 3 - To find Upper quartile and lower quartile

Lower quartile data set is the median of the upper terms from median

{19,21,35,38,40,40,41,42}

Median of the set is $M=\frac{38+40}{2}=39$

∴ $Q_1=39$

Upper quartile data set is the median of the lower terms from median

{ 50,54,56,60,62,64,66,67}

Median of the set is $M=\frac{60+62}{2}=61$

∴ $Q_3=61$

We have plot the box plot attached below.

Our box plot is matched with Box plot E.

Therefore, Option E is correct.

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