Joe drew this bar model to find the unknown number of balls. find the unknown number? 106 ? = 250

144

Step-by-step explanation:

We are given that

106 balls+_=250 balls

We have to find the  unknown  number of balls in model.

Let x be the unknown number of balls.

To find the unknown number of balls we will use subtraction property of equality.

Substitute the value

This is the algebraic expression for this model

Using subtraction property of equality

Then, we get

After simplification, we get

Hence, the unknown number=144

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