Solve the simultaneous equations
2x – 4y = 19
3x + 5y = 1

X =
Y=

y = -5/2

x = 9/2

Step-by-step explanation:

2x – 4y = 19

3x + 5y = 1

Make the x coefficients the same

6x – 12y = 57

6x + 10y = 2

Subtract the equations

(6x - 6x) + (-12y - 10y) = 57 - 2

-22y = 55

-2y = 5

y = -5/2

Substitute y into either equation to find x

2x – 4y = 19

2x – 4(-5/2) = 19

2x + 10 = 19

2x = 19 - 10

2x = 9

x = 9/2

3x + 5y = 1

3x + 5(-5/2) = 1

3x - 25/2 = 1

6x/2 - 25/2 = 2/2

6x/2 = 2/2 + 25/2

6x/2 = 27/2

2x/2 = 9/2

x = 9/2

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4