Answer:28
Step-by-step explanation:
Julio's number is x 
(X-13)*-3=-45
Divide by -3
X-13=15
Add13 to both sides
x=28
 
        
             
        
        
        
Your equation for number one is 600,788,188/760,507,625 = x/100
After cross multiplying you will get 760,507,625x = 60,078,818,800
Then you will divide by <span>760,507,625 to isolate the varible to get 78.99 = x.
Your equation in number two is 80/143 = x/100 because when you subtract 143  by 63 you get 80, the amount of males in the room. Then you cross multiply to get, 143x = 8000. Then you would divide both sides by 143 to isolate the varible to get 55%</span>
        
             
        
        
        
Answer:
The equation for a is 
The altitute is 101,428.57 feet
Step-by-step explanation:
You know that the relationship between ground temperature and atmospheric  temperature can be described by the formula 
t = -0.0035a +g
where:
- t is the atmospheric  temperature in degrees Fahrenheit
- a is the altitude, in feet, at which the atmospheric temperature is  measured 
- g is the ground temperature in degrees Fahrenheit. 
Solving the equation for a: 
-0.0035a +g=t
-0.0035a= t - g


<u><em>The equation for a is </em></u> <u><em></em></u>
<u><em></em></u>
If the atmospheric temperature is -305 °F and the ground temperature is 50 °F, then t= -305 °F and g= 50 °F
Replacing in the equation for a you get:


a= 101,428.57
<u><em>The altitute is 101,428.57 feet</em></u>
 
        
             
        
        
        
Answer:
5 cm
Step-by-step explanation:
Given a semicircle with perimeter 25.71 cm, we are required to find the radius of the circle.
Circumference of a Semicircle
=Length of the Circular part+Length of the diameter

