Answer:
Step-by-step explanation:

Answer:
$142.95
Step-by-step explanation:
Given Original value of the sofa = $349
Rate of depreciation each year = 20%
Number of years = 4
To find the value of the sofa after 4 years use depreciation formula:
If the constant decrease in population be R% per annum. Then the population after n years is 

= 142.9504
= 142.95 (Nearest cent)
Hence, the value of sofa after 4 years is $142.95.
Answer:
-10
Step-by-step explanation:
3x^2 - 2(3y + 2x)
3(-2)^2 - 2(3(5) + 2(-2))
3*4 -2( 15-4)
12 -2(11)
12-22
-10
Perimeter is 2L + 2W
Now plugging in for values we know
42=2L + 2(7)
Move the 14 to the other side to isolate the variable L
28=2L
Divide by 2
L= 14 feet
L is length
One and seventy-five thousandths