Plz, help me with this question!

870

Step-by-step explanation:

Assuming you mean

30

Using the definition

n =

where n! = n(n - 1)(n - 2) ..... 3 × 2 × 1

Then

30 = =

Cancel the terms 28(27)... on numerator/ denominator, leaving

30 = 30 × 29 = 870

answer is 8x+24

area of vanessa's patio = length × width

given, length = (3x² + 5x + 10)

width = (x² - 3x - 1)

area of vanessa's patio = (3x² + 5x + 10)(x² - 3x - 1)

= 3x²(x² - 3x - 1) + 5x(x² - 3x - 1) + 10(x² - 3x - 1)

= 3x⁴ - 9x³ - 3x² + 5x³ - 15x² - 5x + 10x² - 30x - 10

= 3x⁴ - 4x³ - 8x² - 35x - 10

hence, expression of vanessa's patio = (3x⁴ - 4x³ - 8x² - 35x - 10)