Answer:
3
Step-by-step explanation:
18 factors to 2, 3, 3
45 factors down to 5,3,3
 
        
             
        
        
        
It's a simultaneous equation:
Steps:
1.Number the equations..
a+b=77 -1
a-b=13 -2
2. Choose what variable you want to use. In this case I would use the "b". Since the signs in front of the "b's" are different, add the two equations together 
a + b = 77
+ + +
a (-b) = 13
Which gives;
2a = 90
Then solve to find a:
2a=90
a= 90/2
a=45
3.Then plug the "a" value into any of the original equations to find the "b" value. I would use equation 1 since the all the variables are positive.
a + b = 77
(45) + b = 77
 b=77-45
 b=32
4.Solution
a=45 
b=32
        
             
        
        
        
Answer:
(1, 3)
Step-by-step explanation:
  2x + 3y =  11      ------------(i)
-4x + 2y = 2        ------------(ii)
Multiply equation (i) by 2.
(i)*2              4x + 6y = 22
(ii)               <u>-4x  + 2y = 2</u>                  {Now add and x will be eliminated}
                             8y = 24
y= 24/8
y = 3
Plugin the value of y in equation (i)
2x + 3*3 = 11
2x + 9 = 11
2x = 11-9
2x = 2
x = 2/2
x = 1
 
        
             
        
        
        
Answer: If you see this line solid its > or equal too this > with line underneath
If you see line broken it's only >
Y>_ - 1/4x+2
Step-by-step explanation:
Starts at 2 on y then next pt go down 1 and 4 to the right
 
        
             
        
        
        
We can find this using the formula for arc length (where  is the radius of the circle and
 is the radius of the circle and  is the central angle in radians):
 is the central angle in radians):

In our problem, we are given  . This means that:
. This means that:

The measure of the angle is 1.5.