TRANSFORMING FORMULAS

Lesson 7-7

Math Vocabulary

formula

A math statement, usually an equation, that is represented by variables and is used to solve for a specific answer

Transforming Formulas

Solve the area formula A = lw for l

A = lw

*Goal is to ISOLATE the identified variable

A = lww w

A = l w

Transforming Formulas

Solve the perimeter formula P = 2l + 2w for l

P = 2l + 2w -2w - 2w

P – 2w = 2l 2 2

P – 2w = l 2

Transforming Formulas

Solve the variable indicated in red:

h = k . j

5a + 7 = b

3 r – 7 = p 4

PracticeSolve the variable indicated in red:

a) p = s – c

b) I = prt

c) y = x + 8 3

d) P = 2l + 2w

Homework

p. 367-368

#3, 4, 6, 7, 9, 10, 19-22