Answer:
2.5
Step-by-step explanation:
50 x $0.05 = 2.5
Based on the given mathematical statement, it can be rewritten into a mathematical equation to simplify and to be solved easily. The statement, "When one is subtracted from three-tenths of a number" corresponds to the equation, 3x/10 - 1, that is assuming the number is represented by the variable x. This is equal to one-fifth of the number. In other words,
3x/10 - 1 = x/5
x = 10
Answer:
Brand X has to mix 8.4 oz of brand A mixed nuts which contain 35% peanuts and 12.6 oz of brand B mixed nuts which contain 25%, to obtain 21 oz. Bags of mixed nuts that contain 29% peanuts.
Step-by-step explanation:
Hi
We define
, wich means Brand A has 1 oz containing 35% peanuts.
, wich means Brand b has 1 oz containing 25% peanuts.
So we can build an equiation system
(1) 
(2)
, after fixing it a little
(2)
As we can use any method to solve the system, I used a calculator wich thrown the following results 
and 
.
The sixth number should be 16 in order for the mean to be 12
3 sisters bought 2 x 3 = 6 dress and and 1 x 3 = 3 purses.
3 sisters bought 6 dresses and and 3 purses.
Find 3 purses:
1 purse = $26
3 purses = $26 x 3 = $78
Find 6 dresses:
Total = $205.50
6 dresses = $205.5 - $78
6 dresses = $127.50
Find 1 dress:
6 dresses = $127.50
6 dresses = $127.50 ÷ 6
1 dress = $21.25
Answer: $21.25
