- How do I solve 9^x+2=15 ?

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W800: How many degrees C° does w800 reach? White light is directed at difraction grating at angle normal to gratting.starting at norml to grating 0dgre the odr of red,gren,blue wil be? Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4? A constant current of 1A flow in circuit over period of 5s.total charge flowing through circuit over this duration will be.
Expert plz and? A partir de qual atividade o homem relacionava-se com o tempo durante o tempo medieval?