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Mathematics
14.10.2022 20:08
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Simplify 6m^2-5m-3+3m+4+9m^2

Simplify 6m^2-5m-3+3m+4+9m^2
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mia3128
mia3128
5,0(63 marks)

15m²-2m+1

Step-by-step explanation:

To simplify, you want to combine like terms.

15m²-2m+1

lostcharmedone01
lostcharmedone01
5,0(35 marks)

\huge\boxed{15m^2-2m+1}

Step-by-step explanation:

6m^2-5m-3+3m+4+9m^2\\\\\text{combine like terms}\\\\=(6m^2+9m^2)+(-5m+3m)+(-3+4)\\\\=(6+9)m^2+(-5+3)m+1\\\\=15m^2-2m+1

harvzoie
harvzoie
4,6(38 marks)

ST is 28

Step-by-step explanation:

Using the similarity formla

RL/LS  = LM/ST

3/12 = 7/x+2

3(x+2)=84

x +2= 84/3

x+2 =  28

x= 28-2

x = 26

ST = x+2

ST = 26+2

ST = 28

Hence the length of ST is 28

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