Two families go to a theatre the smith family of three adults and four children pay£67. the jones family of five adults and six children pay £106

children = £8.5

adults = £11

Step-by-step explanation:

5 (3a + 4c = 67)      

-3 (5a + 6c = 106)

15a + 20c = 335

-15a - 18c = -318

2c = 17

c = £8.5

3a + 4 x 8.5 = 67

3a + 34 = 67

3a = 33

a = £11

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles