Answer:
Small box weighs 13.75 kg & large box weighs 15.75 kg
Step-by-step explanation:
We can write 2 simultaneous equation and solve for weight of each box.
<em>Let weight of large box be l and small box be s.</em>
<em />
"<u>3 large boxes and  5 small boxes has a total weight of  116 kilograms</u>":

and
"<u>9 large boxes and  7 small boxes has a total weight of  238 kilograms</u>":

<em>Now we can solve for l in the 1st equation and put it into 2nd equation and get s:</em>
<em> </em>
</em>
<em>now,</em>
<em> </em>
</em>
<em />
<em>now we plug in 13.75 into s into equation of l to find s:</em>
<em> </em>
</em>
 
        
             
        
        
        
Answer:
21 degrees
Step-by-step explanation:
Triangles have a total angle of 180 degrees.
This makes our equation:
3x+3+4x+135=180
Subtract 135 from both sides and combine like terms
7x + 3 = 45
Subtract 3 from both sides
7x = 42
Divide both sides by 7
x = 6
Plugging the number in:
3x + 3 =
3(6) + 3 =
21
 
        
             
        
        
        
Answer:
y = -0.5x - 2
Step-by-step explanation:
equation: f(x) = mx + b
f(-4) : -4m + b = 0  ...(1)
f(0):   0m + b = -2            b = -2   ... plug in (1)
-4m - 2 = 0
m = - 1/2 = - 0.5
linear equation: y = -0.5x - 2
 
        
             
        
        
        
The answer should be t=-24