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page 67 #5.
Year 0 -- home value x
year 1 -- home value 3x
year 2 -- home value 1/2 * (3x) (this is current value... 1.5x)
So we've made 50% above our initial investment of x.
Page 68 #3
12 / total = 75 / 100
(12, as a percentage of the total, is 75 as a percentage of 100)
12/t = 75/100
12/t = 3/4
Cross multiply
48 = 3t
divide both by 3
t = 16
page 86, #6
Cross multiply, first
7x = 3(x+12)
7x = 3x + 36 (don't forget to multiply the 3 by EVERYTHING in the parentheses)
subtract 3x from both sides
4x = 36
divide by 4
x = 9
page 86 #8
-3(14-2x) = -6 - 2x
-42 + 6x = -6 - 2x
Multiply a -1 through the whole thing.
42 - 6x = 6 + 2x
Add 6x to both sides
42 = 6 + 8x
subtract 6
36 = 8x
4.5 = x
Veritas Help
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