Question

Medal and Fan please help




Simplify.

| –3.9| + | 3.9|

A.
–7.8

B.
0

C.
7.8

D.
8

Answer 1

Are you familiar with the absolute value notation? What does it mean to take the absolute value (the vertical lines) of a number?

Answer 2

its -7.8 yah

Answer 3

Close
what is the absolute value of-3.9?

Answer 4

Can you walk me through how you got that?

Answer 5

That's a whole lot of Absolute Values to have a negative result

|-3.9| = ??
|3.9| = ??

Answer 6

-3.9+3.9= 7.8

Answer 7

Answer my two questions separately.

Answer 8

idk how

Answer 9

Think "magnitude" only, not direction.

How far is 3.9 from zero (0)?

Answer 10

3 away?

Answer 11

3.9

How far from zero is -3.9?

Answer 12

3.9 away

Answer 13

Perfect. You can now answer the two questions...

|3.9| = ??
|-3.9| = ??

Answer 14

3.9=-3.9
-3.9=3.9

Answer 15

No, |3.9| = 3.9 -- The absolute values do nothing to positive numbers.
Yes, |-3.9| = 3.9 -- The absolute values change the sign of negative numbers.

Answer 16

ohhh so it is positive 7.8

Answer 17

|-3.9| + |3.9| = 3.9 + 3.9 = 7.8

That's it.

Answer 18

yayy thankss

Answer 19

Don't be afraid to write things out. The notation and visualization will help you.

Good work.

Answer 20

ok i got another one but its really different

Answer 21

Let's see it. Generally, we like one question per post. I can give you more medals that way! :-)