1 / 11

DO NOW:

DO NOW:. Solve the equation 10x – 14 = 6 12x + 2 = 9x +14 Evaluate the expression for m = -5 18m - 25. 1-4 Rewriting Equations and Formulas. OBJECTIVE: To rewrite equations with more than one variable. Example 1: . Solve 9y + 4x = 7 for y Solution

peony
Télécharger la présentation

DO NOW:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DO NOW: • Solve the equation • 10x – 14 = 6 • 12x + 2 = 9x +14 • Evaluate the expression for m = -5 • 18m - 25

  2. 1-4 Rewriting Equations and Formulas OBJECTIVE: To rewrite equations with more than one variable

  3. Example 1: • Solve 9y + 4x = 7 for y • Solution 9y + 4x = 7 Write the original equation -4x -4x Subtract 4x from each side 9y = 7 – 4x 9y = 7-4x Divide each side by 9 9 9 y = 7/9 – 4/9

  4. Example 2: • Given the equation xy + 3x = 2, find the value of y when X = 2 and x = -2 Solution: xy + 3x = 2 Write the original equation xy = 2-3x Subtract 3x from each side. y = 2-3x divide each side by x. x When x = 2: When x = -2 Y = 2 – 3 (2) = -2 y = 2 – 3(-2) = -4 (2) (-2)

  5. Checkpoint: Solve the equation for y. Then find the value of y for the given value of x. • 1. 2y – 2x = 6, x = 4 2. 3xy + x = 5, x =2

  6. DO NOW: • Given the equation xy + 2x = 4, find the value of y when x = 1 and when x = -2

  7. Day 2: Common Formulas

  8. Common Formulas Formula Variables Simple Interest I = Prt I = interest P = principal r = rate, t = times Temperature F = 9 C + 32 F = degrees, Fahrenheit 5 C = degrees, Celsius Distance d= rt d = distance r = rate, t = time Area of a Triangle A = 1bh A = area, b = base 2 h = height Area of a Rectangle A = lw A = area, l = length, w = width Perimeter of a Rectangle P = 2l + 2w P = perimeter, l = length w = width

  9. Common Formulas continued Area of a trapezoid A = 1 (b1 + b2) h A= area, b1 = one base 2 b2 = other base, h = height Area of a Circle A = πr2 A = area, r = radius Circumference C = 2πr C= circumference, r = radius

  10. Example 4 • Solve F = 9C + 32 for C 5 F = 9C + 32 Write the original equation 5 F – 32 = 9 C Subtract 32 from each side 5 5(F – 32) = C Multiply each side by 5 9 9.

  11. Checkpoint • 4. Solve I = Prt for t 5. Solve A = 1 (b1 + b2) h for h 2

More Related