which product is not equal to -1?
A. 4/5 x 85/68 = +1
B. 3/27 x -216/24= -1
C. 7/8 x -16/14 = -1
D. -1/12 x -12 = +1
are those right? And if so does that mean the answer is A and D?
It is not correct answer
To determine which product is not equal to -1, we need to calculate the value of each expression.
A. 4/5 x 85/68 = (4 x 85)/(5 x 68) = 340/340 = 1
B. 3/27 x -216/24 = (3 x -216)/(27 x 24) = -648/648 = -1
C. 7/8 x -16/14 = (7 x -16)/(8 x 14) = -112/112 = -1
D. -1/12 x -12 = (-1 x -12)/12 = 12/12 = 1
From the calculations, we can see that expressions B, C, and D all give a product equal to -1. Expression A gives a product equal to +1. Therefore, the correct answer is B, C, and D.
To determine which product is not equal to -1, let's evaluate each option step by step:
A. 4/5 x 85/68 = +1
First, multiply the numerators (4 * 85) to get 340, and multiply the denominators (5 * 68) to get 340 as well. Both the numerator and denominator are the same, resulting in a quotient of 1. Therefore, A is equal to +1, not -1.
B. 3/27 x -216/24 = -1
First, simplify the fractions: 3/27 reduces to 1/9, and -216/24 simplifies to -9. The product of 1/9 and -9 is -1. Therefore, B is equal to -1.
C. 7/8 x -16/14 = -1
First, simplify the fractions: -16/14 reduces to -8/7. Then, multiply the numerators (7 * -8) to get -56, and multiply the denominators (8 * 7) to get 56. The quotient of -56/-56 is +1, not -1. Therefore, C is not equal to -1.
D. -1/12 x -12 = +1
The product of -1/12 and -12 is +1. Therefore, D is equal to +1, not -1.
Based on the above calculations, options B and D both give products equal to +1, not -1. So, the answer is B and D.