If 10% of a number is 12 and 45% of the same number is 54 find 35% of that number

Jackson drew 4 hearts and 29 circles. what is the ratio of circles to all shapes?

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?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.