Question

find ques 3 and 4 please.

Answer 1

(4)1
=(3/7)+(-9/7
=3/7-9/7
=3-9/7
=-6/7 answer
(2)
=
$24 \div ( - 28 \div 12) \\ 24 \div ( - 7 \div 3) \\ 24 \div - 7 \div 3 \\ 24 \times 3 \div - 7$
=72/-7
(3)
Answer is 0

Answer 2

3)here is our answer.
4) a) 3/7 +(-9)/7
so the denominator is same
=3+(-9)
=-6/7
b)24 / 28/-12
=(24) / (-7/3)
=24 x 3/(-7)
=72/(-7)
3) the answer is zero