Algebra: Chapter 8, Lesson 4, page 373.
Using systems of equations
Steps to solve systems of equations can be:
- Graph the equations
- Substitution of one variable in terms of the other
- Adding or subtracting the 2 equations
Before you start attacking the word problem, make sure you have a plan of attack such as:
- Understand the problem
- Develop and carry out a PLAN
- Find the ANSWER and CHECK
Click here for a pretty good link from purplemath.com with examples.
Two of tonight’s homework problems solved by MrE are here! Just click it!
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Algebra: Chapter 3, Lesson 7, page 142.
Formulas
Formulas that use more than 1 letter are often called literal equation. Use the formula and solve for the desired variable by treating all other variables as if they are constants or coefficients. Constants are separated by `+` and `−` symbols whereas coefficients are like `2x`, the `2` is a coefficient.
Just solve these like any other equation using the strategies from yesterday
- Multiply both sides to clear fractions or decimals, if necessary.
- Collect like terms on each side, if necessary.
- Use the addition property to move the variable to one side and all other terms to the other side of the equation.
- Collect like terms again, if necessary.
- Use the multiplication property to solve for the variable.
Two of tonight’s homework problems solved by MrE are here! Just click it!