7(2x+5)+3(x-1) ? combining like terms

What is the solution for 6 - 7/8? explain the steps.

How many and of which kind of roots does the equation f(x)=x3−x2−x+1

Which problem would you use the following proportion to solve for? 24/x=40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?