Question

Laci is studying for her fourth algebra test. Her first three test scores were 82, 93, and 87. Laci needs to know what she must score on her test in order to have an average of exactly 90. Which equation can be used to find the score Laci needs?

Answer 1

Let she score x in her 4th test to get an average of 90
so
\[\frac{82+93+87+x}{4}=90\]

Now you can find x from this, can't you?

Answer 2

Thank You But Can YOu Help Me With This
The total cost for the bus tickets for a family equals the number of adults at $1.00 each plus the number of children at $0.50 each. Which equation could be used to model this situation?
Answer