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Formulas

Formulas. Section 3.7. Formula. A formula is an equation that relates two or more real-life quantities . Don’t Write--You can solve a formula to describe one quantity in terms of the others. Find a formula for r in terms of d and t. t. t. Using the Distance Formula.

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Formulas

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  1. Formulas Section 3.7

  2. Formula • A formula is an equation that relates two or more real-life quantities. • Don’t Write--You can solve a formula to describe one quantity in terms of the others.

  3. Find a formula for r in terms of d and t. t t Using the Distance Formula In other words SOLVE FOR r d=rt Now Use the new formula to find the rate if you drive 400 miles for 5.5 hours. (nearest tenth) d= rt

  4. Find a formula for l in terms of A and w. w w Using an Area Formula In other words SOLVE FOR l A=lw Now Use the new formula to find the length of a rectangle with an area of 35ft2 and a width of 7 ft. A = lw

  5. Simple Interest What is my rate for an investment of $1500 if it made $54 in interest for one year? Solve for r.

  6. The formula for the volume of a rectangular prism is V = LWH. Which equation solves the formula for L? • L = V - WH

  7. The formula for the volume of a pyramid is V = . Which equation solves the formula for h? • h = 3Vb

  8. -3x -3x Solving a function for y… Rewrite the equation so that you isolate the y variable

  9. Solve for y: 4x – 2y = 12 - 4x - 4x -2y = –4x+12 -2 -2 y = 2x - 6 • Subtract 4x from both sides • Simplify • Divide both sides by -2 • Does it simplify?

  10. Practice… Solve for y

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