Which of the following are like terms in this expression? 12a-7+7a+12b. A. 7 and 7a. B. 12 and 12a. C. -7and 12b. D. 7a and 12a.

D. 7a and 12a

Step-by-step explanation:

7a and 12a both have the variable a, raised to the first power

sorry not sure

step-by-step explanation:

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