If the mean of 6 numbers increased by 3, by how much would the sum of the 6 numbers have to increase? *
O 18
O 21
O 12
O 3
O 6

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?