Please answer I need help Write the following expression using symbolic language. 1) Five less than the product of seven and a number x

2) The difference of nine times a number y and eighteen

3) Half a number n increased by four times the number

4) Twice the sum of a number w cubed and twenty-three

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

the answer to your question is b.