Jake bought 14.5 pounds of dried navy beans for $25.52.
1 answer:
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Let
x----------------> <span>width of the margin
we know that
[Area </span><span>printed matter]=140
</span>[Area printed matter]=[(14-2x)*(18-2x)]
then
[(14-2x)*(18-2x)]=140--------> (252-28x-36x+4x²)=140
(252-64x+4x²)=140----------> 4x²-64x+112=0
using a graph tool---------> <span>I solve the quadratic equation
see the attached figure
x1=2
x2=14----------> is not solution
the answer is
the margin should be 2 cm</span>
x----------------> <span>width of the margin
we know that
[Area </span><span>printed matter]=140
</span>[Area printed matter]=[(14-2x)*(18-2x)]
then
[(14-2x)*(18-2x)]=140--------> (252-28x-36x+4x²)=140
(252-64x+4x²)=140----------> 4x²-64x+112=0
using a graph tool---------> <span>I solve the quadratic equation
see the attached figure
x1=2
x2=14----------> is not solution
the answer is
the margin should be 2 cm</span>
<h3>Option C</h3><h3>(3 + 19) - 12 = 3 + (19 - 12) represent associative property of addition</h3>
<em><u>Solution:</u></em>
<em><u>The associative property of addition of three numbers a, b and c is given as:</u></em>
<em><u>Option A</u></em>
( 3 + 19 ) - 12 = (3 + 12) - 19
Here, +19 in left side of equation is written as -19 in right side of equation
Therefore, it does not represent associative property of addition
<em><u>Option B</u></em>
3 + (19 - 12) = 3 + (19 + 12)
Here, -12 in left side of equation is written as +12 in right side of equation
Therefore, it does not represent associative property of addition
<em><u>Option C</u></em>
(3 + 19) - 12 = 3 + (19 - 12)
22 - 12 = 3 + 7
10 = 10
This represents associative property of addition
<em><u>Option D</u></em>
3 + (19 - 12) = 3 - (19 + 12)
3 + 7 = 3 - 7
10 not equal to -4
Therefore, it does not represent associative property of addition