SOLUTION: I just like someones opinion if you can check them for me to see if I am correct. thanks. Directions: Complete the ordered pairs so that each is a solution for the given equatio

Question 66585: I just like someones opinion if you can check them for me to see if I am correct. thanks.
Directions: Complete the ordered pairs so that each is a solution for the given equation.
(0, ), ( ,3/4 ), ( ,0), ( 8/3, )
Pair:(0, ) = 3(0) + 4y = 12
4y = 12
4y / 4= 12/4
y = 3
Pair:( , 3/4)= 3x + 4(3/4) = 12
3x +3 = 12
-3 -3
3x = 9
3x/3 = 9/3
x = 3
Pair: ( , 0)= 3x + 4(0) = 12
3x =12
3x/3 = 12/3
x = 4
Pair: (8/3, )= 3 (8/3) + 4y = 12
8 + 4y =12
-8 -8
4y = 4
4y/4=4/4
y = 1
My answer:
All solutions are: (0,3), (3, 3/4),(4,0), (8/3,1)

Science and medicine. Celsius temperature readings can be converted to Fahrenheit readings using the formula F=9/5C + 32 . What is the Fahrenheit temperature that corresponds to each of the following Celsius temperatures:
-10, 0,15, 100?
My answers For:
-10 is F=14
0 is F=32
15 is F=59
100 is F=212

Business and finance. When x number of units are sold, the price of each unit (in dollars) is given by p=-x/2 + 75. Find the unit price when
the following quantities sold: 2, 7, 9, 11
My answers for:
2 is P=$74
7 is P=$71.50
9 is P=$70.50
11 is P=$69.50

Find the slope of the line through the following pairs of points.
(-5, -3) and (-5,2)
My answer is:
The slope is undefined.
Find the slope of the line through the given points.
Points are: (2,4) and (6,3)
MY answer: slope is = -1/4
Points are: (2,1) and (2,7)
My answer: Slope is=undefined.
find the slope of
Points are: (0,5) and (-3, -1)
My answer: Slope is=2
find the constant of variation k.
m varies directly with n; m=144 when n = 8
m = kn
144 = k (8)
144/8=k(8)/8
k= 18

Business and finance. The revenue for a sandwich shop is directly proportional to its advertising budget. When the owner spent $2000 a month on advertising, the revenue was $120,000. If the revenue is now $180,000, how much is the owner spending on advertising?
Formula: rev = k (ad bud)
120,000 = k(2000)
k = 60
Equation: rev = 60 (ad bud)
180,000 = 60(ad bud)
Advertising budget = $3000 this is how much the owner is spending on advertising budget.

Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
I couldn't find a single mistake. Good job.
Happy Calculating!!!!
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