A machine can make 14,400 nails in 6 hours? A second machine can make twice as many nails per hour. What is the constant of proportionality between the number of nails and the
number of minutes for the second machine?

answer is a

step-by-step explanation:

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

12cm

the answer is d

48 / 6 = x

in this case, x will equal the amount of money in each card!

x therefore will be 8.

trent had $8 in each birthday card.