Answer:
1.4 oz
Step-by-step explanation:
you know 3.5oz is 2.5 servings and you need to know what one is
3.5/2.5 = 1.4
one serving is 1.4 
check -> 1.4 x 2.5= 3.5
 
        
             
        
        
        
Answer:
200 sq units
Step-by-step explanation:
As you might know, 3 angles of a triangle adds up to 180*. Since you already know the angles are 60* there is one more 60*. So by this you know that all the sides are equal.
As the given states, one side is 20. So following the standard way to get the area of a triangle b*h/2; 20*20 = 400 / 2 = 200 sq units 
 
        
             
        
        
        
To solve his equation start by finding how many gallons of gas you need to purchase for the total trip. 
Set up an expression that divides the total distance of the trip by the miles received per gallon. 
This gives you:
400 / 35
Divide to get 11.43 gallons.
To find the cost of this, multiply the total number of gallons needed to cover the trip by the cost of each gallon. 
Set this up in another expression.
This results in:
11.43 x 3.30
Multiply the values to find the total cost. 
This leaves you with:
37.72
So, the total cost for gas for a 400 mile trip on 35 miles per gallon is $37.72.
I hope this is correct and helps you! :)
        
             
        
        
        
Write an equation, calling the number x:
3x=2(x+4)
3x=2x+8
x=8
However, 8 is not a perfect square, which was required in the problem, so there are no solutions.