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3 years ago

How do you subtract 7 2/8 - 6 10/16

Mathematics

2 answers:

andrew11 [14]3 years ago

6 0

Answer:

you would first make them improper fractions

58/8 - 106/16

then you would time 58/8 by 2/2 to get like denominators

116/16 - 106/16= 10/16= 5/8

So your answer is 5/8

Step-by-step explanation:

Nutka1998 [239]3 years ago

6 0

Answer:

1 3/5

Step-by-step explanation:

you have to make 7 2/8 into a common denominator which will be 16

1. 7 2/8 = 7 4/16

2. subtract 6 10/18 and 7 4/10

3 you get 1 6 /10 but u simplify it to 1 3/5

4 your final answer is: 1 3 /5

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You go shopping at a local department store with your friend and cousin. You buy one pair of jeans, four pairs of shorts, and tw

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Answer: Cost per pair of jeans = $ 20

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Step-by-step explanation:

Let x= cost per pair of jeans

y = Cost per pair of shorts

z= cost per shirt.

For you, total cost = x+4y+2z= 84

For your friend, total cost = 2x+y+3z=76

For cousin, total cost = x+2y+z= 52

Required system:

$x+4y+2z=84\ (i)\\ 2x+y+3z=76\ (ii)\\ x+2y+z=52\ (iii)$

from (i), $x=84-4y-2z$ (*)

put this in (ii) and (iii) we get

$2\left(84-4y-2z\right)+y+3z=76\\\Rightarrow\ -7y-z+168=76\ (iv)\\\\ 84-4y-2z+2y+z=52\\\Rightarrow\ -2y-z+84=52 \ (v)$

from (iv), $y=-\frac{z-92}{7}\ (vi)$

$\mathrm{Subsititute\:}y=-\frac{z-92}{7}\ \text{in}\ (v)$

$-2\left(-\frac{z-92}{7}\right)-z+84=52\\\\\Rightarrow\ -2\left(-\frac{z-92}{7}\right)-z=-32\\\\\Rightarrow\ -\frac{5z}{7}-\frac{184}{7}=-32\\\\\Rightarrow\ -5z-184=-224\\\\\Rightarrow\ -5z=-40\\\\\Rightarrow\ z=8$