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frosja888 [35]
3 years ago
7

How many solutions do the following equations have?

Mathematics
1 answer:
Leni [432]3 years ago
8 0

Answer:

Step-by-step explanation:

15y+12x = 18 is equivalent to 5y+4x = 6

2x+3y = 12 is equivalent to -6y = 4x-24

one solution: (x,y) = (-21,18)

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Simplify <img src="https://tex.z-dn.net/?f=%5Csqrt%7B-72%7D" id="TexFormula1" title="\sqrt{-72}" alt="\sqrt{-72}" align="absmidd
Dmitry_Shevchenko [17]

Answer:

i3 \sqrt{8}

Step-by-step explanation:

\sqrt{ - 72}  \\   \sqrt{ - 1}   \times   \sqrt{72}  \\  \sqrt{ - 1}   \times   \sqrt{9}  \times  \sqrt{8}  \\ i3 \sqrt{8}

5 0
3 years ago
Mountain bike is priced at 413 if he sells tax is 6.5% what is a constant purchase a mountain bike round to the nearest cent if
madreJ [45]

Answer:

Mountain bike is priced at 413 if he sells tax is 6.5% what is a constant purchase a mountain bike round to the nearest cent if necessary

Step-by-step explanation:

it is 439.85

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3 years ago
Simplify the following surds 45 &lt;------ the 45 is a surd
Anika [276]
I think the answer is 3 route 5
First find a perfect square that goes into 45 in this case 9
Then as it's 9x5 simplify the nine to 3
Hope this helps
8 0
3 years ago
Fluffy, Spot and Skampy have a combined age in dog years of 91. Spot is 14 years younger than Fluffy. Skampy is 6 years older th
WITCHER [35]

Answer: fluffy = 33yrs

Spot = 19 yrs

Skampy = 39 yrs

Step-by-step explanation:

Let fluffy = x

Spot = y

Skampy =z

x + y + z = 91 -------1

x -14 =y ------2

z = x + 6 --------3

Put eqn 2 and 3 in eqn 1

x + x - 14 + x + 6 = 91

3x = 99

x = 33

y = 33-14= 19

z = 33+6 = 39

8 0
3 years ago
Find the distance between the points (1,8) and (9, 2).
grin007 [14]

Answer:

distance = \sqrt{(x_{1} -x_{2})^2+(y_{1} -y_{2})^2  }\\\\

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6 0
3 years ago
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