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3 years ago

Which of the following is a root of the polynomial function below? F(x)=x^3-3x^2+x+5

Mathematics

1 answer:

Olegator [25]3 years ago

7 0

Answer: 5

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Trabajadores 360 180 120 80 60

My name is Ann [436]

Answer:

Step-by-step explanation:

answer is b

3 0

3 years ago

-3c=15 c = __ help plz

LuckyWell [14K]

You would divide negative 3 (-3) from both sides to keep the c by itself. When you divide a positive by a negative it becomes negative.

Dividing 15 by -3 would equal -5, so c = -5

7 0

3 years ago

#9 and #10<br> Please show work

Tatiana [17]

Answer:

Part 9) The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13

Part 10) The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot

Step-by-step explanation:

Part 9)

Let

x ----> number of items on Emily's grocery list

x ----> number of items on Bobby's grocery list

we know that

$y=2x+3$ ----> equation A

$x=y-8$ ----> equation B

Solve by substitution

Substitute equation A in equation B

$x=(2x+3)-8$

solve for x

$x=2x-5$

$2x-x=5$

$x=5$

Find the value of y

$y=2(5)+3=13$

therefore

The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13

Part 10)

Let

x ----> the height of the taller bookshelf in feet

y ----> the height of the shorter bookshelf in feet

we have

$x=5y-1$ ----> equation A

Remember that

$1\ ft=12\ in$

To convert inches to feet divide by 12

$60\ in=60/12=5\ ft$

$x+y=5$ ----> equation B

Solve the system by substitution

substitute equation A in equation B

$(5y-1)+y=5$

solve for y

$5y+y=5+1$

$6y=6$

$y=1\ ft$

Find the value of x

$x=5(1)-1=4\ ft$

therefore

The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot

3 0

3 years ago

What is the domain of the functions below: b y= 5x/|x−1| −1

sdas [7]

Answer:

<h2>DOMAIN: The set of all real numbers except 0</h2>

$\large\boxed{x\in\mathbb{R}-\{0\}}$

Step-by-step explanation:

We have a faction.

We know: the denominator must be different from 0. Therefore

$y=\dfrac{5x}{|x-1|}-1\Rightarrow |x-1|\neq0\iff x-1\neq0\iff x\neq1$

4 0

3 years ago

PLEASE HELP (picture attached) explain if you can but if not that’s ok:)

makvit [3.9K]

Answer:x=2

Step-by-step explanation:

X=-b/2a

b=-4 a=1 in front of x

X=- - -4/2

X=4/2=2

6 0

3 years ago