I need step by step help

y = 3n + 70 - 35 or y = 3n + 35

Step-by-step explanation:

you get 3n bc she gets 3 rocks per hike(n)

you get 70 - 35 or just 35 bc she started with 70 then gave half away and half of 70 is 35

d 600 because 15*10*2=300

300+300=600

step-by-step explanation:

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076