I need help/answers for these questions it will be a huge faveur../

1-Simplify:

a: 3x(5x-2) -x (x(squared)-7) -x
b: 5w-3(squared)-2+2w
c: 8(x+3)-2(x-1)

2-Solve:

a: 8x-7=5(x+4)
b: 8-2x=5
c: 3x-5=7
d: 7(3-p)=9-4p

3-First three numbers in a sequence are 1, 2 and 4 exlapin why the fourth term would be 7 or 8..

4-Factorise the expiression

3x(squared)-15x

5-Work out and leave answers as fraction

2/3+3/5+7/4
2 6/7 + 1 3/4
2 1/2 + 1 3/4

6-Square root of 1.44

7- 1.3 squared=