TriangleABC is similar to TriangleDEF; solve for A

BC = EF

AB    DE

9 = 6

x    8

x(6) = 8(9)

6x = 72

6      6

x = 12

a=1/2b*h; solve for h

2a = b* h

b     b   

2a=h

b

d=m/v

m=28

v=4

d=28/4

d=7

d=rt

r=12

t=3

d= (12)(3)

d=36

ax+b=c; solve for x

-b -b             

ax = c-b               

 a      a                

  x=  c-b                

a

w = -6

   4.5    5    

4.5 (6) = 5(w)   

-27 = 5w 

 5       5  

-5.4 = w

w= -5.4

z+3 = z+4

4        6

4(z+4) = 6(z+3)

4z + 16 = 6z + 18

-4z          -4z        

-16 = 2z + 18

-18          -18

-34 = 2z

2      2

-17 = z

z= -17

cost             $1.56

ounces (unit)         48 oz       

$.0325/oz

unit rate- $.03 per oz

n = is

100  of

amount of change

original amount

original - new

original

new - original

original

greatest possible error

measurement

greater difference

measurement

maximum - measured

measured - minimum

(answer has to be positive)