Plz Help I Will Give Brainliest.

(a) The top of a hill rises 312 feet above Checkpoint 2.
What is the altitude of the top of the hill?

(b) How much lower is Checkpoint 2 than Checkpoint 3?

a) 149 ft. b)39 ft.

Step-by-step explanation:

trust

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation:

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)