(4 points) A given relation R={A, B, C, D, E} is decomposed into two relations: R1={A, B, C, E}, R2={B, C, D} a. Based on the given set of FDs F={BàE, CEàA}, is the above decomposition a lossless-join decomposition? Why? b. Based on the given set of FDs F={EàD, BCàA }, is the above decomposition a lossless-join decomposition? Why?

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

the first one, all those points on the line just make a strait line.

your answer is  

a.

5

step-by-step explanation: