Decreasing then increasing, y goes down then y goes back up
        
                    
             
        
        
        
Answer:
For D. X= 3, or 0 but probably not 0
For the 2nd picture you sent,  x= -2, or -3
Step-by-step explanation:
So for D. you want to make sure you only have 1 Variable, and since we know y=x squared + 7x+5, we subsitute y for what it is equal to.
Then we refine the question, which takes it out to
x squared-3x+5=5 (because the 7x-10x = 3x)
We subtract 5 from both sides which leaves us with x Squared - 3x= 0
Which we then solve with the Quadratic formula. and we separate the solutions to get the different answers for 3, and 0
 
        
             
        
        
        
The interest rate would be 5%
        
             
        
        
        
m∡A = 70º
1) Considering that the Sum of the interior angles within a triangle is always 180º
2) We can write the following, and solve for x
x+80 + x +80 +40 = 180
2x +160 +40 = 180
2x + 200 = 180
2x =180-200
2x= -20
x=-10
3) So since angle A = x +80, we can plug it into that the value of x
m∡A = x +80º
m∡A=-10+80
m∡A = 70º
 
        
             
        
        
        
The answer is: -3y+9z
This is because you simply switch the sign for every number in the parentheses.
Hope this helps!