Answer:Incorrect.
For example, two equations with same y intercept.
y = 2x + 3
y = 5x + 3
This system has only one solution.
Another example,
y = x + 7
y = x + 7
This system has infinitely many solutions.
So she is not correct because of the first example.
Step-by-step explanation:
Answer:
40
Step-by-step explanation:
36 = 90% × (number of questions)
36/0.90 = (number of questions) = 40 . . . . . divide by the coefficient of the variable
There were 40 questions on the test.
Answer:

Step-by-step explanation:
Further Solving :

8/21 is the answer to the question
Answer:
28
Step-by-step explanation:
Hope this helped.