1.
Determining number of solutions to linear equations
2.
Solving systems of linear equations by graphing
3.
Solving systems of linear equations by elimination
4.
Solving systems of linear equations by substitution
5.
Money related questions in linear equations
6.
Unknown number related questions in linear equations
7.
Distance and time related questions in linear equations
8.
Rectangular shape related questions in linear equations
9.
System of linear equations
10.
System of linear-quadratic equations
11.
System of quadratic-quadratic equations
12.
Solving 3 variable systems of equations by substitution
13.
Solving 3 variable systems of equations by elimination
14.
Solving 3 variable systems of equations with no or infinite solutions
15.
Word problems relating 3 variable systems of equations
Back to Course Index
Find the equation of the parabola, y=ax2+bx+cy = ax^{2} + bx + cy=ax2+bx+c, that passes through (-2, -10), (1, -4), (3, 30).
The sum of the digits of a three-digit number is 16. The units digit is 2 more than the sum of the other two digits, and the tens digit is 5 more than the hundreds digit. What is the number?
The measure of the largest angle of a triangle is 30° less than the sum of the measures of the other two angles and 9° less than 2 times the measure of the smallest angle. Find the measures of the three angles of the triangle.
Thomas has $6000 invested among a checking account paying 2% annual interest, a savings account paying 5% annual interest, and a bond paying 7% annual interest. He earns a total of $355 in annual interest and he has $2300 less invested in his savings account than in her bond. How much has he invested in each account?
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