PLEASE HELP WILL GIVE BRANLIEST

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000