I am unsure about the very last problem but I can help with the first two
1) (y+1)+4
If we combine the numbers 1 and 4, we get +5 and can isolate the numbers from the variable.
This would give us

2) (6*r)*7
remember that we do not have to explicitly state 6*r
Instead, we can write it as 6r
this helps us get rid of the parentheses
now we can write it as 

I hope this helps!:)
 
        
        
        
Answer:
x = - 7
Step-by-step explanation:
Given
- 5(x - 2) - (x + 2) = 50 ← distribute parenthesis on left side
- 5x + 10 - x - 2 = 50, that is
- 6x + 8 = 50 ( subtract 8 from both sides )
- 6x = 42 ( divide both sides by - 6 )
x = - 7
 
        
                    
             
        
        
        
A). Simply, subtract 100 percent minus 65 percent, which gives you the answer 35 percent.
b). So, to find the total number you add 280 plus 65 percent, which gives you the answer, 462.
c). To find this, simply subtract 462 minus 280, which gives you the answer, 182.
Hope this helps!
♤MidnightQueen
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
<u>We know that:</u>
- Some squares are 100% shaded, and some are half shaded. 
- Half shaded squares: 10 squares
- 100% shaded: 20 squares
- Area of figure = Area of half shaded + Area of 100% shaded
<u>Solution:</u>
- Area of figure = Area of half shaded + Area of 100% shaded
- => Area of figure = (10 x 1/2) + 20
- => Area of figure = 5 + 20
- => Area of figure = 25 units²
Hence, the area of the figure is 25 units².