The formula for the area of a trapezold with altitude k and bases m and n is A=k/2(m+n) Solve for m.

Hence, option C is true.

Step-by-step explanation:

Given the expression

Solving for 'm'

Flip the equation

Expanding by applying the distributive law:

Add (-1)/2 × kn to both sides

simplify

Divide both sides by k/2

Therefore,

Hence, option C is true.

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