7. The original quantity is 10 and the new quantity is 13. What is the percent change? Is it an
increase or decrease?

Answer : 30%

Step-by-step explanation:

Original Value = 10   New Value = 13, % Increase = ?

% Increase = 13-10/10 × 100%

% Increase = 3/10 × 100%

% Increase = 30% ( Answer)

- 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