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Monica [59]
3 years ago
11

How to solve 12x-y=37 and -5x-y=-14 using elimination method and please show work

Mathematics
1 answer:
Over [174]3 years ago
4 0

Answer:

x = 3, y= -1

Step-by-step explanation:

12x-y=37

-5x-y=-14

12x-y=37

-1(-5x-y)=-1(-14)

12x-y+5x+y=37+14

17x = 51

(17x)/17 = 51/17

x = 3

12(3)-y=37

36-y=37

-y = 1

y = -1

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will ran four miles on his first day of training t next day he ran one third that distance how far did he run the second day
andrew11 [14]
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3 years ago
Change the fraction w-3/w+5 into an equivalent fraction with the denominator w2 + w – 20.
viktelen [127]
ANSWER

\frac{ {w}^{2}  - 7w + 12}{ {w}^{2}  + w - 20 }

EXPLANATION


The given fraction is,

\frac{w - 3}{w + 5}

To get an equivalent fraction, we multiply both the numerator and the denominator by the same quantity that will give us

w²+w-20

in the denominator.


This implies that,

\frac{w - 3}{w + 5}  =  \frac{(w - 3)(w - 4)}{(w + 5)(w - 4)}

We multiply out the numerators and denominators using the distributive property to obtain,


\frac{w - 3}{w + 5}  =  \frac{ {w}^{2}  - 4w - 3w + 12}{ {w}^{2} - 4w + 5w - 20 }

This simplifies to

\frac{w - 3}{w + 5}  =  \frac{ {w}^{2}  - 7w + 12}{ {w}^{2}  + w - 20 }


5 0
3 years ago
A listing of observed values and the corresponding frequency of occurrence of each value is called a
atroni [7]

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Step-by-step explanation:

3 0
3 years ago
Evaluate the following if k=0.5, n=-3, and p=-2: K+n(p^2)​
ivann1987 [24]

Answer:

-11.5

Step-by-step explanation:

K + n( {p}^{2} ) \\  \\ plug \: K = 0.5, \: n =  - 3, \: p =  - 2 \\  \\ K + n( {p}^{2} )  \\  \\  = 0.5 + ( - 3) \{ {( - 2)}^{2}  \} \\  \\  = 0.5 - 3 \{ 4 \} \\  \\  = 0.5 - 12 \\  \\  =  - 11.5

5 0
3 years ago
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