The number name for this number is six hundred forty million, four hundred nine thousand, two hundred ten
6x…… +4×… … ..+4× +9×……… +2×……… +1×……… =

What are the domain and range of the function? f(x) = -4 (sqrt)x

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.