Step-by-step explanation:
(b) If then
Note that cancel out so we get
Solving for we get
(c) I'm not sure what the problem is asking for but here goes. As r doubles, becomes
Answer:
x=3
Step-by-step explanation:
7x-3=18
7x=18+3
7x=21
x=3
Answer:
a.
b.
c.
Step-by-step explanation:
Given:
, and
the upper quartile is 160
Answer:
shorter piece = 6. longer piece = 12
Step-by-step explanation:
short piece = s
long piece = l
l+s= 18
l= 6+s , substitute
6+s+s = 18
6+2s= 18
2s= 18-6
2s= 12
s=12/2
s= 6= shorter piece
l= 6+s
l= 6+6= 12 = longer piece