3 years ago

What is the slope-intercept equation for this standard form equation? 6x - 3y = 12

Mathematics

1 answer:

Kryger [21]3 years ago

3 0

Step-by-step explanation:

solve for y

subtract 6x from both sides

6x-6x-3y=12-6x

-3y=12-6x

divide both sides by -3

-3/-3y=(12-6x)/-3

y=2x-4

y=mx+b

m=slope

b=y-intercept

2=slope

-4=y-intercept

Hope that helps :)

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a) six pens and five pencils cost $2.50 while three pens and two pencils cost $1.15 . what will be the cost of a pen and 4 penci

melisa1 [442]

Let pen's cost be x and pencil's cost be y.

6x + 5y = 2.50
3x + 2y = 1.15

Thus, 3x = 1.15 - 2y
Therefore, 6x = 2.30 - 4y

Substituting the value of 6x ;

(2.30 - 4y) + 5y = 2.50

or, 2.30 + y = 2.50

=> y = 0.20.

Substituting the value of y ;

6x = 2.30 - 4(0.20)
6x = 2.30 - 0.80 = 1.5
6x = 1.5
=> x = 0.25

Thus, 1 pen costs 0.25 $ and 1 pencil costs 0.20$.

Thus, cost of one pen is 0.25$.
Cost of 4 pencils is 0.80 $

0.25$ + 0.80$ = 1.05$

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Effectus [21]

Answer:

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Step-by-step explanation:

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