Question

Show all your work.


1. Suppose a and b are real numbers where a > 0 and b < 0.
a. Is –a + b positive or negative. Explain how you know.
b. Is a – b positive or negative? Explain how you know.
c. Is b – a positive or negative. Explain how you know

Answer 1

So a is positive and b is negative.
-a is negative
b is negative

(-a)+b...is... ?

Answer 2

-b

Answer 3

negative plus a negative is....?

a-b = -(-a+b)

So this second part is the negative of the first part we did.
a is positive
-b is positive

Answer 4

-a+b wilbe negative because a>0 and b<0 for eg
so a>b so subtracting a from b will give a negative no

Answer 5

a positive

Answer 6

a is positive
-b is positive

Answer 7

So Part B is positive.

Answer 8

PartC is basically the same as part A

Answer 9

is my answer right

Answer 10

okay

Answer 11

Just change the order.