Agroup of friends were at the restaurant. when the bill of 175 dollars came, two people left before the bill was paid. this resulted in the payment of 10 dollar extra by the remaining individuals. how many people were in the group at first? ?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)

Acar loses a quarter of its value every year. it is originally worth $35,000. to the nearest dollar,how much will the car be worth in 8 years?