Sorry i’m not positive on how to solve the other ones and i don’t want to teach you wrong but here is the answer to number 3 i hope it helps.
What is the solution to the system of equations? (5, 0) (0, 5) (0, –5) (–5, 0)
2 answers:
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The mean is the sum of all numbers divided by the number of numbers. We can set up an equation:
Where 'x' is the next quiz score she need. Solve for 'x'. Multiply 5 to both sides:
Add:
Subtract 322 to both sides:
So her next quiz score needs to be 73 in order to have a mean score of 79 on all her quizzes.
Where 'x' is the next quiz score she need. Solve for 'x'. Multiply 5 to both sides:
Add:
Subtract 322 to both sides:
So her next quiz score needs to be 73 in order to have a mean score of 79 on all her quizzes.