Answer:
42
Step-by-step explanation:
Do the math:)
 
        
             
        
        
        
Answer:
change the equation into one variable.
2 y equals 10 + x
y equals 5 + x by 2
now put that into the second equation
-3x + b parentheses 5 + x / 2 equals 11
-3x+b(5+ x/2)
-3x + b5 + bx/2 = 11
 
        
                    
             
        
        
        
Answer:
99
Step-by-step explanation:
You can solve it by Squaring/multiply 18 by itself and 15 by itself then subtract them both:
(18 × 18) - (15 × 15)
324 - 225
99
You could also do difference of two squares:
(x² - y²)
= (x + y) (x - y)
= (18 + 15) (18 - 15)
= (33) (3)
= 99
 
        
                    
             
        
        
        
I believe the answer is 9.
        
                    
             
        
        
        
Answer:
3 1/3
Step-by-step explanation:
Make the fractions into improper fractions:
2 1/2 = 5/2 
1 1/3 = 4/3 
5/2 × 4/3 = 
5×4/2×3 = 
20/6 = 
10/3 = 
3 1/3