The sum of two numbers is 30. One number is twice as large as the second number.
Let x = the smaller number.
Which let statement would you use for the larger number?
Let x + 2 be the larger number.

Let 2x be the larger number.

Let 30x be the larger number.

I'm terrible at math any here is appreciated.

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?