Answer:The answer is d.overturning the supreme courts decision in Dred Scott V. Sandford
Step-by-step explanation:
Answer:
x=9 x=-5
x² − 4x + 4 = 49
(x-2)²= 49
x-2= 7 or x-2=-7
x=9 or x=-5
6 years
$8 per year 48÷8=6 years