Pilar wanted to use estimation to solve a decimal addition problem.

answer: it is a.,b.,d.

step-by-step explanation:

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c

answer: 12x^2+6x

step-by-step explanation:

6x does not equal 24x. hope it works!