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nadya68 [22]
2 years ago
12

Một cửa hàng bán một bang ủi điện được lãi 20% theo giá bán. Hỏi người đó được lãi bao nhiêu phần trăm theo giá vốn?

Mathematics
1 answer:
Tems11 [23]2 years ago
8 0

Answer:

a welding torch requires 4122.8L of ethylene gas at 0.64 atm

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- (4x4- 2x' +7x²+2 x - 1)=(x+3)
Gnom [1K]

Answer:

No solution?

Step-by-step explanation:

Im confused, can you give more information.

4 0
3 years ago
PLEASE HELP ME ASAP!
AleksandrR [38]

Ok so first we find the equation that equals one variable.


2y = -x + 9

3x - 6y = -15


We solve for y.


2y = -x + 9

y = -x/2 + 9/2


Then we plug in this y value into the other equation to keep only one variable so we can solve for it.


3x - 6y = -15

3(-x + 9/2) - 6y = -15

-3x + 27/2 - 6y = -15

-9y + 27/2 = -15

-9y = 3/2

-y = 3/18

y = -3/18


Then we plug in this numerical y-value into the first equation which we found out by solving an equation for y.


y = -x/2 + 9/2

-3/18 = -x/2 + 9/2

-84/18 = -x/2

-x = 9 1/3

x = -28/3


Your answer would be (-28/3, -3/18)


Hope this helps!

6 0
3 years ago
Read 2 more answers
Triangle PQR has coordinates P(–8, 3), Q(–8, 6), and R(–3, 6). If the triangle is translated by using the rule (x, y) right-arro
amid [387]

Answer:

Step-by-step explanation: in the x's place add 4 to that number and in the y's place subtract 6 from that number:

P= -4,-3

Q= -4,0

R= 1, 0

3 0
2 years ago
Read 2 more answers
I need help on my math homework I don't understand it.
maw [93]

Step-by-step explanation: do fast

when you will upload the picture do fast

8 0
3 years ago
the length of a rectangle is three less than twice its width. If the perimeter is 48, find the length.
Alisiya [41]

length = 15

let the width = w then length = 2w - 3

Perimeter = 2(length + width)

                = 2(2w - 3 + w) = 2( 3w - 3) = 6w - 6 = 48

hence 6w = 48 + 6 = 54 ⇒ w =\frac{54}{6}= 9

Thus length = 2w - 3 = (2× 9) - 3 = 18 - 3 = 15


3 0
2 years ago
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