You want to park your boat at a local boat dock at 1pm but we are in a drought and you need to make sure that the water will be high enough. Your boat will get stuck if the tide is not at least 7 feet high. The high tide
is at 5:00 am and a low tide at 10:00 am. At the low tide the water depth is 4 feet and at the high tide the
water depth is at 10 feet.

i got 142 as my answer

step-by-step explanation:

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.