your answer for this question is y=c hope this helps
 
        
             
        
        
        
-4x+y= -9 can be turned into 
y= -9 + 4x 
5x+2y=3 (plug y in)
5x+2(-9+4x)=3
5x-18+8x=3 
5x+8x=3+18
13x=21
divide 13 on both sides 
x=1.6
        
             
        
        
        
Step-by-step explanation:


 
        
             
        
        
        
Composition means that you can plug g(x) into f (x). This is written as "( f o g)(x)", which is pronounced as "f-compose-g of x". And "( f o g)(x)" means " f (g(x))". That is, you plug something in for x, then you plug that value into g, simplify, and then plug the result into f. hope this helps.
        
             
        
        
        
Answer:
15:17
Step-by-step explanation:
Since the triangle has a right angle, we may find the length of the unknown side using the trigonometric notations SOH CAH TOA where
SOA stands for
Sin Ф = opposite side/hypotenuses side
Cosine Ф = adjacent side/hypotenuses side
Tangent Ф = opposite side/adjacent side
With respect to ∠B given that ∠D=90°,
BD is the adjacent side
CB is the hypotenuse side
and DC is the opposite side
Hence Sin B = 15/17