Work out the size of angle x.
Х
105%
140°
PLS HELP

x = 65°

Step-by-step explanation:

By exterior angle theorem:

x + (180° - 140°) = 105°

x + 40° = 105°

x = 105° - 40°

x = 65°

b. x + 1

step-by-step explanation:

i'am smart

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)