The sum of 3a²-a-3 and 2a-9 is 3a²+a-12
3a²+a-12 - (a²-3a-7) = 3a²+a-12 - a² + 3a + 7 =
2a² +4a - 5
Answer:
Her sign is in error. The answer is -3/8.
Step-by-step explanation:
Nancy's answer has the correct magnitude. It is obtained by multiplying 1/4 by -3/2. However, the sign of that product will be negative. Nancy has reported a positive answer, so <em>it is incorrect</em>.
3/4 of a pound. Why? 1/4 & 3/4 have the same denominator so you just compare the numerators. 3 is obviously bigger then 1 so there is your answer. If you were thinking about let's say cakes it would be the other way around. Would you rather share it with 3 people and get small pieces or share it with 1, which can basically be yourself.
8/9 x 3/5 = 24/45
24/45 is your answer
hope this helps :D
7 inches x 17 boards = 119 inches
119 inches / 12 inches per foot = 9 feet 11 inches.
7 feet x 17 boards = 119 feet.
119 feet + 9 feet 11 inches = 128 feet 11 inches