Tell whether each question can be written in the form y = mx + b
y = 8 - x^2 NO
y = 4 + x YES
y = 3 - 2x YES
The answer depends on the weight of each individual bag. Do you know exactly how heavy each of the bags are? Please be more clear in your question.
Let B = the weight of box B
Let 2B = the weight of box A
Let 2B + 30 = the weight of box C
B + 2B + 2B + 30 = 640
5B = 610
B = 122 pounds, weight of box B
2B = 2(122) = 244 pounds, weight of box A
2B + 30 = 2(122) + 30 = 274 pounds, weight of box C
hope this helps
I agree its 167 but if that was an example you basically just cross multiply whenever you have a similar problem:
167/100 = x/100
100x = 167 * 100
x = 16700 ÷ 100
x = 167
