Answer:
<h2>231cm²</h2>
Step-by-step explanation:
First, let's find the surface area of both the triangles
5x3=15
So, the surface area of the triangles is 15 sq.cm
Now, let's find the surface area of the base (large rectangle in the middle)
12x8=?
10x8=80
2x8=16
80+16=96
12x8=96
So, the surface area of the base, is 96sq.cm
Now, let's find the surface area of both of the side rectangles
12x5=60
60x2=120
So, the surface area of the two side rectangles is 120sq.cm
Now, let's find the total surface area by adding all of our answers.
120+96=216
216+15=231
<h2>
So hence, the surface area of this net is 231cm²</h2>
 
        
             
        
        
        
Answer:
The specific gravity of kerosene is 0.82
Step-by-step explanation:
Let
x -----> the weight in grams of a cubic centimeter of Kerosene
y ----> the weight in grams of a cubic centimeter of water
z ---> the specific gravity of a substance
so

we have

substitute the values

 
        
                    
             
        
        
        
I'm guessing this is what the question is asking?
 
        
        
        
Answer:
x^2 +13x+42
Step-by-step explanation:
(x+6)(x+7)
FOIL
first: x*x = x^2
outer: 7x
inner:6x
Last: 6*7 =42
Add them together
x^2+7x+6x +42
Combine terms
x^2 +13x+42
 
        
                    
             
        
        
        
Answer:
5
Step-by-step explanation:

Parallel lines have same slope. 
So, slope of required line = 5