What is the value of the unknown number in the verbal description? 5 times the sum of 12 and a number is 80. a.28 b.16 c.1 d.4

D. 4

Step-by-step explanation:

Let the unknown number be x.

The given verbal description :  5 times the sum of 12 and a number is 80.

i.e.

To solve the above equation, first divide 5 on both sides of the equation, we get

Now, Subtract 12 on the both sides of the equation, we get

Hence, the unknown number is 4.

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