Explain why you cannot use mass or volume alone to identify substances.

Answers

Answer 1

Answer: That is because mass and volume depend on the size of the sample. The same substance can come in different sizes in which its mass and volume would be different.

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What is the area of 9 cm 3 cm of the rectangle

Answers

Answer:

27cm²

Step-by-step explanation:

it should be the area of rectangle..

Answer:

Step-by-step explanation:

27 sq cm

2y = x + 3 5y = x - 7 What is the solution set of the given system?

Answers

2y = x + 3 then x = 2y - 3
5y = x - 7 then x = 5y + 7

so
2y - 3 = 5y + 7
2y - 5y = 7 + 3
-3y = 10
y = -10/3
y = -3 1/3

2y = x + 3
2 (-10/3) = x + 3
-20/3 - 3 =x
-29/3 = x
-9 2/3 =x
or
x = -9 2/3

solutions: x = -9 2/3 and y = -3 1/3

Answer: the solution set would be {(-29/3, -10/3)}

Step-by-step explanation:

What is the range of y = sin θ ?

Answers

Hello,

-1<=y<=1
=============

Answer:

[-1,1]

Step-by-step explanation:

Do you trust me????????

Factor
3x ^2 +20x+12

Answers

$3x^2+20x+12=3x^2+18x+2x+12\n\n=3x(x+6)+2(x+6)=(x+6)(3x+2)$

Need some help (I get like no change back at all I just want to know the process of doing this)Im usually good at math but congratulations stupid problem you've done me wrong.lol1.
Wonderland Water Park
The Coaster $4.50
The Slide $4.00
The Drop $3.50

You and three friends are going to Wonderland Water Park. Your group plans to ride each water ride twice. Prices are shown in the table above.

How much change will you get back from a $100 bill?

(Points : 1)
$96
$76

$24
$12
I got 96 and that's only 4 dollars change I figured it out silly me no I didn't man im all jacked up lol I got it the answers 76 wow yaaaa me

Answers

(you and 3 friends so we have 4 person
The group plans to ride each water ride twice.
so for each person we will pay 2(4.5+4+3.5)=2*12=24$
and for 4 person 24*4=96$
100-96=4$
Answer: 4$)

but looking on gaven answers i understood that each person pay only for himself!
so you paid 24$ and will get back 100-24=76$
Answer: 76$

The account charged 35 for the first hour of work and 23 for each hour after that. He earned a toatl od 127 how many hours did he work