Indicate a general rule for the nth term of this sequence.
12m, 15m, 18m, 21m, 24m, . .
choices:
a.) an = 3mn + 9m
b.)an = -3mn – 9m
c.)an = -3mn + 9m
d.)an = 3mn – 9m

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Which of the following is true for the relation f(x)=2x^2+1

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x