Answer: She spend $1.20 for lunch.
Step-by-step explanation:
Let the total amount be 'x'.
Half of her money spend for lunch be 
Half of her money left for a movie be
Amount she has now = $1.20
So, According to question, it becomes ,
Hence, Amount she spend for lunch is 
Therefore, she spend $1.20 for lunch.
Answer:
i dont know how to help
Step-by-step explanation:
The cost of each duck is $ 7 and cost of each chicken is $ 12.
Step-by-step explanation:
Given,
5 chickens and 3 ducks are bought by $ 81
A chicken costs $ 5 more than a duck.
To find the cost of each duck and cost of each chicken.
Let,
The cost of each duck = x
The cost of each chicken = x+5
According to the problem,
5(x+5)+3x = 81
or, 5x+25+3x = 81
or, 8x = 81-25
or, 8x = 56
or, x = 7
Hence,
The cost of each duck = $ 7
The cost of each chicken = $ 7+5 = $ 12
To solve this problem you must apply the proccedure shown below:
1. You have the followin quadratic equation given in the problem above: <span>x^2+3x+1
2. Therefore, you have:
x^3+3x=-1
(b/2)^2=(3/2)^2=9/4
x^2+3x+9/4=-1+9/4
(x+3/2)^2=5/4
Therefore, as you can see, the answer is: </span>(x+3/2)^2=5/4
