Question

Answer with steps pls

Answer 1

Do you want us to do all seven?   I don't think so.

17.   s for Sonia, m for Sam, n for Nigel

s = 13.2 + 1.4 m

n = -10 + 2.5 m

n = 12 + s

First and third,

n = 12 + (13.2 + 1.4 m)

Second and that one,

-10 + 2.5m = 25.2 + 1.4m

1.1m = 35.2

m = 35.2/1.1

m = 32

Answer: 32 kg

18.

f - # of $500 tickets, t - $300 tickets, w  - $200 tickets

t = 2f

w = -60 + t

500f + 300t + 200w = 48000

f = t/2

500(t/2) + 300t + 200(-60 + t) = 48000

750t = 60000

t = 80

w = -60 + t = 20

Answer: 20

19.

c + b = 171

c/9 = b/9 -5

c = b - 45

Adding,

2c + b = b + 126

c = 63

Answer: 63

Three's my limit.