What is the normal way of writing numbers called?
ex: 29,980,000,000
(as opposed to standard form:
ex: 2.998 x 10^8)

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.