Ken predicts that the average temperature will be −5°C in December. If he predicts the temperature will rise 6°C in January and fall 3°C in February, which of the following equations can he use to find the sum of the temperatures for those months? Check all that apply.

a [6 + 3] + 5 = 14
b(–5) + [3 + 6] = –4
c[(–5) + (–3)] + 6 = –2
d5 + [(–6) + (–3)] = –4
e[6 + (–5)] + (–3) = –2
f[(–5) + 6 ] + (–3) = 4

Question

Ken predicts that the average temperature will be −5°C in December. If he predicts the temperature will rise 6°C in January and fall 3°C in February, which of the following equations can he use to find the sum of the temperatures for those months? Check all that apply.

a [6 + 3] + 5 = 14
b(–5) + [3 + 6] = –4
c[(–5) + (–3)] + 6 = –2
d5 + [(–6) + (–3)] = –4
e[6 + (–5)] + (–3) = –2
f[(–5) + 6 ] + (–3) = 4