F(x) = 2x + c g(x) = cx + 7
fg(x) = 4x + d
C and d are constants.
Work out the value of d.

May someone help me pleas

d=  13

Step-by-step explanation:

fg(x) = 2(cx+5) + c

= 2cx+10+c                          

fg(x) = 6x+d. fg(x) = 2cx+10+c

6x = 2cx and d = 10+c          

3 = c and therefore d = 13  

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