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3 years ago

Identify the property shown (3x5)x10=3x(5x10)

Mathematics

2 answers:

yarga [219]3 years ago

7 0

Asociative property of multiplication

Kruka [31]3 years ago

5 0

<span>Identify the property shown
(3x5)x10=3x(5x10)
</span>
Reflexive Property

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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

VashaNatasha [74]

Answer: Cost per pair of jeans = $ 20

Cost per pair of shorts = $12

Cost per shirt = $8

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

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

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

$\mathrm{Subsititute\:}z=8\text{ in (vi)}$

$y=-\frac{8-92}{7}\\\\\Rightarrow \ y=12$

$\mathrm{Subsititute\:}z=8,\:y=12\text{ in (*)}$

$x=84-4\cdot \:12-2\cdot \:8\\\\\Rightarrow\ x= 20$

Hence, x= 20, y= 12 , z=8

So, Cost per pair of jeans = $ 20

Cost per pair of shorts = $12

Cost per shirt = $8

7 0

3 years ago

Can I get help please

WITCHER [35]

Answer:

sorry you cant get help but you can help me!

GO TO MY PAGE

Step-by-step explanation:

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3 years ago

Craig just purchased a new car. He financed $45000 and must pay it back over 5 years with 11% interest. a) How much will craig h

nignag [31]

Answer:

49950

Step-by-step explanation:

111% of 45000 is 49950

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3 years ago

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Can you guys help me? Best answer gets branliest

Rus_ich [418]

Answer:

its less than one i think cause ive answered this same question not to long ago

Step-by-step explanation:

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3 years ago

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What is the cost in dollars of 20 pounds of potatoes priced at c cents pre pound

const2013 [10]

Answer:

20*x

Step-by-step explanation:

alright so lets start with how many cents are in a dollar

100 cents per dollar

we need to find 20 pounds so we can use an equation i made

lets say it's 22c per pound

20*x=$

lets try plugging in 22

20*.22=$4.20

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4 years ago