On January 1st 2014 there were approximately 10,200 tons of garbage in the Chicago river the river will be officially marked as environmentally safe when there are less than 5,200 tons of garbage each year since then clean up efforts have been able to remove 350 tons of garbage if t represents the number of years since January 1st 2014 which of the following inequalities can be used to determine when Chicago river is environmentally safe?

he has now walked a total of what?

if i know what this is maybe i can

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)

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step-by-step explanation: