smc-4362-10-Substitute

Equations, SMB-012 MC

`y = 2x-3`

`y = 4x + 1`

Which value of `x` satisfies both of these equations?

`x = -2`
`x = -1`
`x = 1`
`x = 2`

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`A`

Show Worked Solution

`text(If)\ x = −2,`

`2(-2)-3`	`= -7`
`4(-2) + 1`	`= -7`

`:. x = -2\ \ text(satisfies both.)`

`=>A`

Algebra, STD2 A1 2005 HSC 2 MC

What is the value of `(a-b)/4`, if `a = 240` and `b = 56`?

`4`
`46`
`226`
`736`

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`B`

Show Worked Solution

`(a-b)/4`	`= (240-56)/4`
	`= 46`

`=> B`