deidaraXneji
01.11.2019 •
Mathematics
How do i simplify the form of expression?
(4x + 5)(x - 7) - 4x^2 + 10x = 9
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Ответ:
3.384
Step-by-step explanation: first expand to remove the brackets
4x^(2)-23x-35-4x^(2)+10x-9=0.
-13x-44=0
x=44/13
x=3.384
Ответ:
$15.6
Step-by-step explanation:
Sanita pays $63 for 5 posters that are $3 off each, if you divide 63 by 5 you will get $12.6, so you have to add $3 to $12.6 to get 15.6 which was the original price of one poster.