Question

EXERCISE 1.2
1. Verify the commutative property of addition for the following rational numbers:
5 7
-2 1
(a)
2 3
and
(b) and-
and
8 -12
-3 5
5 10
2. Verify that (a + b)+c= a + (h + where
(c)
(
d)
10
and
14
21​

Answer 1

answer 123 Step-by-step explanation:

Answer 2

Answer:

1.2cm.

(Angle of a rectangle)

By Pythagoras thearam

BD² = BC ² + = 35²+

BD2= 1225 + 144

BD