Ken, Leon, and Mark collect seashells as a hobby. Ken has (3x – 5) seashells, Leon has (2x + 1) seashells, and Mark has (0.25x + 7) seashells. a. Write an expression for the total number of seashells they collected. b. If the total number of seashells they collected is 45, determine the number of seashells each of them have.

The answer:how do we know:we have -5 + -5=0 becausenegativenegatives only go up by subtractingso 0+-5 is 5.we can do 1+1 as were doingpositive2×1so 1+1=2.0.25×7we need to know that we canso we getflip the problem7×0.25. this makes things easy for you and me, we already know that 4 0.25’s make 1 and we also know that0.25+0.25is 0.50 and1 + 0.50is 1.50 or just 1.5Answer: