Answer:
<h2>
x = 90° - 30° = 60°</h2>
Step-by-step explanation:
Angles CGE and 30° are vertical angles.
Thus, Angle CGE is thus 30°.
Angle CGE and Angle x are complementary, so x = 90° - 30° = 60°
 
        
                    
             
        
        
        
(86.8 - 3n)/4
You can get this by combining the two. Make sure to give common denominators. 
        
             
        
        
        
Answer:
y = -1/2 x - 3.5
Step-by-step explanation:
y = mx+ b 
m is the slope of the line 
m = -1/2
b is the y-intercept 
b = -3.5
 
        
                    
             
        
        
        
If the mean height of 15 girls is 1.65m, the sum of the girls’ heights is 15×1.65=24.75m.
If the mean height of 10 boys is x metres, the sum of the boys’ heights is 10x m.
The sum of all 25 srudents’ heights is 25×1.682=42.05m.
Therefore, 24.75+10x=42.05, x=(42.05-24.75)/10=1.73m, the mean height of the boys.
        
             
        
        
        
Answer:
Last graph that slopes upwards from left to right and that has an y-intercept of -1
Step-by-step explanation:
let us pick some points!(you can chose any two)
when x =3 , y = 14 : helps us get points (3,14)
when x =1 , y = 4 : helps us get points (1,4)
so we find the gradient using the two points:

we now use gradient 10/2 and point (1,4) to find the equation  of the line:

from the equation of the line found we are able to find the y- intercept of the line is -1 and that the line has a positive gradient thus should slope upwards from left to right.
From the pictures you posted, we pick the last graph as it seem to slope upwards from left to right and has the line cutting y axis at around -1