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Mathematics
04.10.2020 20:54
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Can someone please help me ???

Can someone please help me ???
Can someone please help me ???
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sportygirlscand
sportygirlscand
4,8(77 marks)

C

Step-by-step explanation:

how do you know if an equation has infinite solutions?

if the equation ends with a true statement, like 3=3, then you know it has sinfinite solutions. in this situation x=x

C:

3(2x+1)=6x+3

(multiply 3 by (2x+1))

6x+3=6x+3

(subtract 6x-3 from both sides)

0=0

Evycin
Evycin
4,4(73 marks)

Step-by-step explanation:

(\sin{x} - \sin{y})(\sin{x} + \sin{y}) = \sin^2{x} + \sin{x}\sin{y} - \sin{x}\sin{y} - \sin^2{y}

= \sin^2{x} - \sin^2{y}

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