Answer:
he made the mistake on step one, he didn't distribute correctly
Step-by-step explanation:
-5(x-1) = -5x +5
not -5x - 1
Answer: a) Georgia, b) 120 words
Step-by-step explanation:
We can calculate how many words they each wrote by multiplying their time and the rate at which they write words.
Richard: 45*16 = 720 words total
Georgia: 70*12 = 840 words total.
Therefore, Georgia wrote 120 more words.
Answer:
$6,376.92
Step-by-step explanation:
-Let d be the rate of depreciation per year.
-Therefore, the value after n years can be expressed as:

#We substitute for the years 2009-2013 to solve for d:

#We then use the calculated depreciation rate above to solve for A after 10 yrs:

Hence, the value of the car after 10 yrs is $6,376.92
Answer:
z = 
Step-by-step explanation:
Given z is directly proportional to x and inversely proportional to y then the equation relating them is
z =
← k is the constant of proportionality
To find k use the condition x = 7, y = 7 and z = 2
k =
=
= 2
z =
← equation of proportionality
When x = 10 and y = 12, then
z =
=
= 