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The inequalities is given by x + y ≤ 120, 4.75x + 7.5y > 690 and y ≥ 80. A possible solution is selling 10 tacos and 100 burritos
<h3>What is an equation?</h3>An equation is an expression that shows the relationship between two or more numbers and variables.
Independent variables represent function inputs that do not depend on other values, while dependent variables represent function outputs that depends on other values.
Let x represent the number of tacos and y represent the number of burritos sold, hence:
x + y ≤ 120 (1)
Also:
4.75x + 7.5y > 690 (2)
and:
y ≥ 80 (3)
The inequalities is given by x + y ≤ 120, 4.75x + 7.5y > 690 and y ≥ 80. A possible solution is selling 10 tacos and 100 burritos
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Given the statement, "If 
is odd, then 
is odd," its contrapositive claims that, "If is not odd, then is not odd."
So assume is not odd, i.e. is even. This means there is an integer 
for which 
. Squaring this gives 
.
Well, we can write
, and 
is just another integer, which means 
must be even.
So assume
Well, we can write