Question

What is the perimeter, P, of a rectangle that has a length of x + 6 and a width of y − 1?

P = x + y + 5
P = x + y − 7
P = 2x + 2y + 10 6 years ago

Answer 1

@justus

@mhchen

Answer 2

Thats correct, Good job

Answer 3

Joy is training for a triathlon. She runs a distance of 2x miles, cycles a distance of (x2 + 7) miles, and swims a distance of (x − 2) miles. Which simplified expression is equivalent to the total distance, in miles, Joy covers?

x2 + 3x + 5
x2 + 3x + 9
3x2 + 5
3x2 + 9

Answer 4

2x+x²+7+x-2=x²+2x+x+7-2=
x²+3x+5=total distance

Answer 5

The function f(x) = 4x + 5,000 represents the amount of money a television is being sold for, where x is the number of televisions being manufactured.

The function g(x) = 20x − 500 represents the cost of production, where x is the number of televisions being manufactured.

What is (f − g)(100)? Explain.

$6,900 is the profit made from 100 televisions.
$3,900 is the profit made from 100 televisions.
$6,900 is the cost of manufacturing 100 televisions.
$3,900 is the cost of manufacturing 100 televisions.

Answer 6

F(x)-g(x)=4x+5000-(20x-500)
4x-20x+5000+500
-16x+5500
-16*(100)+5500=3900
3900=3.9k

Answer 7

I believe it is B

Answer 8

okey
@mhchen is it B?

Answer 9

Im positive. Don't worry its right

Answer 10

Which of the following shows that polynomials are closed under subtraction when two polynomials, (5x62 + 3x + 4) − (2x^2 + 5x − 1), are subtracted?

3x^2 − 2x + 5; will be a polynomial
3x^2 − 2x + 5; may or may not be a polynomial
3x^2 + 8x + 3; will be a polynomial
3x^2 + 8x + 3; may or may not be a polynomial



sorry i am makin u help soo much.

Answer 11

It is not the ones with 8s..

Answer 12

Its okay let me try

Answer 13

It's....A? :D

Answer 14

Yes! Great job

Answer 15

Which of the following shows that polynomials are closed under addition when two polynomials 4x2 − 8x − 7 and −5x + 16 are added?

4x2 − 13x + 9; may or may not be a polynomial
4x2 + 13x − 23; may or may not be a polynomial
4x2 − 13x + 9; will be a polynomial
4x2 + 13x − 23; will be a polynomial

Answer 16

What do you think?

Answer 17

Hmm C? Is that correct??

Answer 18

Yes. Amazing :)

Answer 19

Thank you

Answer 20

No problem!

Answer 21

THANK YOU SO MUCH!!!!

Answer 22

YOU ARE THE BEST!!

Answer 23

You're welcome!

Answer 24

I appreciate that

Answer 25

NO. You don't get it!!

Answer 26

I had a C

Answer 27

Oof

Answer 28

You put a different option by accident?

Answer 29

THANK YOUUU!! MY MOM WILL BE HAPPPYYY

Answer 30

You're welcome! I hope she always is

Answer 31

THANK YOUU!!!!!!!!!!