Find the center and radius of the circle (x+0.2)^2 + (y+0.1)^2 = 0.3

2-digit numbers less than 91 which are 1 less than a multiple of 10

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1