The sum of 31/4+42/4= 18.25
<u>Step-by-step explanation</u>:
- The denominators are same. 
- Then add the numerators and keep the denominators same.
The sum of (31/4) + (42/4) = (31+42)/4 
⇒ 73/4
⇒ 18.25 
 
        
             
        
        
        
Answer:
x = 348
Step-by-step explanation:
The measure of angle ABD is (0.15x+65) and the measure of angle CBD is(0.1x+28) . Find the value of x.
0.15x + 65 + 0.1x + 28 = 180
0.25x + 93 = 180
0.25x = 180 - 93
0.25x = 87
x = 87/0.25
x = 348
 
        
             
        
        
        
Cost of items = $23.45
Tax = 8% of $23.45 = 0.08*23.45 = $1.88
Tip = 20% of $23.45 = 0.2*23.45 = $4.69
Total cost = 23.45 + 1.88 + 4.69 = 30.02
Answer: $30.02
        
             
        
        
        
-7x + 6y =5
x intercept. y=0
-7(x) + 6(0)=5
x=-5/7
y intercept, x=0
-7(0)+6(y) =5
y=5/6