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A pattern is shown in the table. Which formula describes the way to calculate C when you know t?
t = 5C + 15
t = 5C + 20
C = 5t + 15
C = 20t
FormulaeEvaluate y=3x+5y=3x+5y=3x+5 when x=−2x=-2x=−2 .
y=11y=11y=11
y=6y=6y=6
y=1y=1y=1
y=−1y=-1y=−1
Expanding BracketsExpand and simplify 2(x+8)+3(5x−4)2\left(x+8\right)+3\left(5x-4\right)2(x+8)+3(5x−4) .
17x+417x+417x+4
10x+2010x+2010x+20
17x+2817x+2817x+28
17x+1217x+1217x+12
17x+2017x+2017x+20
FactorisingFactorise 6x−336x-336x−33
6(x+5)6\left(x+5\right)6(x+5)
3(2x+11)3\left(2x+11\right)3(2x+11)
3(x+11)3\left(x+11\right)3(x+11)
2(3x+11)2\left(3x+11\right)2(3x+11)
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