Answer:
Step-by-step explanation:
To find 
, we need to eliminate 
in this system of equations:
(1)
(2)
From (1) and (2):
Then, we equalize both expressions and solve for :
For this equation, we can let c = the value of one coupon
<span>4c = 108 - 76 </span>
<span>4c = 32 </span>
<span>c= $8
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</span>
Answer:
140
Step-by-step explanation:
Let's start with the question, how many questions do you need to get 88%?
so were are looking for
?/25 = 88% and 88% is also 0.88 so we can multiply 25 by 0.88
we get 22
But this doesn't here. the question asks us how many mistakes do you need. you can just subtract 22 from 25
25-22= 3
you need 3 misses to get 88%
