Chang is incorrect because his factoring results in -21 instead of positive 21.
Benjamin is incorrect because his factoring results in positive 9x instead of -9x.
Habib's answer is incorrect because 4 + 12x is not equivalent to the expression above.
A correct factor would be: 4-3(3x-7)
Answer:
X=3
Step-by-step explanation:
45 * .06 = 2.7
2.7 + 45 = 47.7
so the sweater would be $47.70