If a=4x²+7x-1 b= -x²-5x+3, is 3/2a-2b? a) 4x²+31/2x-9/2 b) 4x²+41/2x-15/2 c) 8x²+31/2x-9/2 d) 8x²+41/2x-15/2

D) it the only one that satisfies the relation for both x = 0 and x = 1

Step-by-step explanation:

i think it is 70

step-by-step explanation:

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