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3 years ago

Choose the simplified answer for this expression.

Mathematics

1 answer:

Alex73 [517]3 years ago

6 0

Answer:

Step-by-step explanation:

If you simplify, you get: 3q+3-4

Simplify more: 3q-1

most simplified.

PS You get 3q+3 by using the distributive 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

Simplify algebraic expression 3/4 (1/2X - 12) + 4/5

Nata [24]

$\frac{3}{4} ( \frac{1}{2} x-12)+ \frac{4}{5} =$

$=\frac{3}{4} ( \frac{x}{2} -12)+ \frac{4}{5}$

$= \frac{3x}{8} -9+ \frac{4}{5}$

$= -\frac{41}{5} + \frac{3x}{8}$

The answer is: $-\frac{41}{5} + \frac{3x}{8}$

8 0

3 years ago

Which one of the following numbers will appear farthest to the left on a number line?

gulaghasi [49]

I think not sure I think -2 but if I had the whole answer to your question I might know more

8 0

4 years ago

(6h + 8) - (3h + 2) = 15<br> PLEASE HELP I ALSO NEED TO SHOW WORK

Anestetic [448]

Answer:

$h=3$