Billy tells his sister Sarah that he is twice as old and twice as smart as her right now. Sarah says that in five years should be twice as old as she is now and that Billy won’t be. How old will they be in five years?

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Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.

Plzzz answer both questions and i will give you 100 points

X= 3y - 6 2x - 4y = 8 solve the system of equations using substitution. a) (-12,-2) b) (15,7) c) (21,9) d) (24,10)