Kevin and randy muise have a jar containing 69 coins, all of which are either quarters or nickels. The total value of the coins in the jar is $13.05 how many of each type of coin do they have ?

Using elimination, what is -4x+2y=-12 4x+8y=-24

(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.)

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red