15 more than three times a number is equal to 75
Also please do a step by step

Step-by-step explanation:

3n+15=75

three times a number is 3n. +15 is 15 more.

3n+15=75  subtract 15 from both sides to get the 3n alone

3n=60 divide by 3 to get the n by itself

n=20

6.9

step-by-step explanation:

simple math really

6 1/2 times 0.6 = 3.9

but if you are just doing 6 and not 6 1/2 then the answer is 3.6

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950