Question

The costs for going to a god beach are $7 for 1 dog, and $2 feet each additional dog. which equation shows this situation where x > 1 ?

Choices:

y = 2x + 5
y = 3x + 11
y = 5x + 2
y = 7x + 11

Answer 1

If x is the number of dogs, then x-1 is one fewer than that number and the cost y is $7 for the first dog and $2 for each of the others, making 2(x-1) the additional cost. So we can write the total cost as y=7+2(x-1).

Explanation:

If we expand the brackets we get y=7+2x-2=2x+5. So the final equation is y=2x+5.