Question

-x- y inside two lines a)x=10.6 y=-3.5 b)x=-3.5 y=10.6 c)x=-3.5 y=-10.6

Answer 1

@phi

Answer 2

do you mean
| -x-y |
?

Answer 3

the y only is inside two lines

Answer 4

does that mean to change the sign?

Answer 5

those mean absolute value. it changes inside to positive.
if it's already positive, it has no effect
but if what is inside is negative , it makes it positive

so
|1| = 1
but
|-1|= 1

Answer 6

is it
-x - |y|
?

Answer 7

so the first one will be -10.6 -3.5

Answer 8

yes

Answer 9

yes, a is -10.6-3.5 which is -14.1

Answer 10

b)-3.5-10.6?

Answer 11

no

Answer 12

why does- 3.5 have to be positive?

Answer 13

-x can be thought of as -1*x

Answer 14

so its positive

Answer 15

if x is -3.5
then -x is +3.5

Answer 16

so then the last two are the same

Answer 17

You can think of it either as
-x means -1*x so -1*-3.5 is +3.5

or you can think: if x is -3.5, then -x must be the opposite sign, so +3.5
(I use the first way of thinking, but both ways work)

Answer 18

yes, the last two become the same number.

Answer 19

so its 3.5-10.6

Answer 20

yes, and that is ?

Answer 21

thanks so much u r very helpful and explain the main stuff so the answer is 7.1 or negative

Answer 22

it's a negative result.
in grade school people are taught:
if the "big" number is negative, do "normal" subtraction but make the answer negative
so do
10.6 -3.5= 7.1
then make it minus: -7.1

Answer 23

i believe its - because you have 3 of something u cant take 10 away or u will be short

Answer 24

thank u

Answer 25

or it could mean
it's 3 degrees outside, and gets 10 degrees lower
3-10= -7 making it -7 degrees

Answer 26

yep