Step-by-step explanation:
(b) If 
then
Note that 
cancel out so we get
Solving for 
we get
(c) I'm not sure what the problem is asking for but here goes. As r doubles, 
becomes
Answer:
4³=4*4*4 is a required expanded form.
So 1/7 divided by 8
equals to 1/ 56 tons per trip
The answers are: 90° , 40°, and 50° .
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Explanation:
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Angle 1 = 90 .
Angle 2 = 3x + 4
Angle 3 = 4x + 2
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Since all angles in every triangle add up to 180 ;
90 + 3x + 4 + 4x + 2 = 180 ; Solve for "x" ; then solve for "angle 2" and "angle 3". Since it is a "right triangle" ; we know that "angle 1" = 90 degrees.
7x + 96 = 180 ;
Subtract "96" from each side of the equation;
7x + 96 - 96 = 180 - 96 ;
7x = 84 ; Divide each side of the equation by "7" ;
7x / 7 = 84 / 7 ;
x = 12:
So; angle 1 = 90 ;
Angle 2 = 3x + 4 = 3(12) + 4 = 36 + 4 = 40 ;
Angle 3 = 4x + 2 = 4(12) + 2 = 48 + 2 = 50 ;
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90 + 40 + 50 =? 180 ? Yes!
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