You should try reading notes you took during your class period.
Answer:
Kathryn thinks that the 3 is the age and the 10 is how many are that age. 10 is thr age and the 3 "x's" are how many people are 10 years old.
Hope this helped!
Answer:
Desiree answered 40 questions correctly
Step-by-step explanation:
Let
x = number of questions answered correctly
y = number of questions unanswered
z = number of wrong answers unanswered
The system of equations can be expressed
x + y + z = 50
3*x - 0.5*y -1*z = 110
Desiree did not leave any question unanswered
This means that the equations become
y = 0
x + z = 50
3*x -z = 110
If we add them together, we get
4x = 160
x = 40
z = 10
She answered 40 questions correctly
You would take -9 - -2 and then add 4 and multiply
