3 years ago

Which property explains why these two expressions are equal?

Mathematics

1 answer:

Lostsunrise [7]3 years ago

5 0

Associative property

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The owner of a small store buys coats for $55.00 each. Answer parts a and b. a. He sells the coats for $77.00 each. What perce

lapo4ka [179]

Th owner must buy 7 Jackets

Step-by-step explanation:

a. Purchase price=$55 , Sell Price= $77

Sell Price = $55+$22

= Purchase price + 40*55/100

=Purchase price + 40% of Purchase price

=140% of purchase price

b. Purchase Price=$35

Sell price=140%of $35

=140*$35/100

=$49

Number of Jackets required for the total sale to be $340 = $340/$49

=6.94

So We get the result by rounding off because Jackets cannot be in fraction, which is 7

6 0

3 years ago

Use the quadratic formula x^2-5x+3=0

kifflom [539]

Answer:

$x^2 -5x +3 = 0\\\\ x= \frac{-b \pm \sqrt{b^2-4*a*c} }{2a} \\\\b = -5, a = 1 , c = 3\\\\x= \frac{-b + \sqrt{b^2-4*a*c} }{2a} , x= \frac{-b -\sqrt{b^2-4*a*c} }{2a}\\\\x= \frac{5 + \sqrt{25-12} }{2}, x= \frac{5-\sqrt{25-12} }{2}\\\\x= \frac{5+\sqrt{13} }{2}, x= \frac{5- \sqrt{13} }{2}$