Club Members = $25 + $7 per movie(x)
No membership club = $12 per movie(x)
We need to know how many movies must each purchase to equal in costs.
Set up both equations to equal each other and solve for x=movies.
25 + 7x= 12x
25 + 7x -7x = 12x - 7x
25= 5x
25/5=5x/5
5=x it will take them both 5 movies each to have equal costs.
Answer:
Markup amount = sellingprice - costprice
=12.50 - 5 = 7.5 is markup
Explaining? Simple!
1. In order to find the answer you simply change 25% to decimal form then multiply by your brushes. Then subtract your value from the original:
25% ⇒ .25 [Note: All percentages are less than one]
[840 x .25] = 210
[840 - 210] = 630.
840 decreased by 25% is 630.
2. For this one, you do the exact same thing as the first one, except you add since it is being increased. So convert 7% to decimal form and then multiply it by your money. The add this value to the original:
7% ⇒ .07 [*Note*: This is 7% not 70%]
[84 x .07] = 5.88
[84 + 5.88] = $89.88. (Don't forget to add your symbols!).
$84 increased by 7% is $89.88!
Answer:
3x+4=y
x+y=32
Step-by-step explanation:
x= magazine book price
y=history book price
you need to multiply the price of the magazine by 3 and add 4 to get the price of the history book, 3x+4=y.
You also need to add the price of the magazine and history book to get $32, x+y=$32.
Maximize 
subject to 
That's clearly maximum when the squared term is zero, so
Answer: a=12, b=24, max 288
