Answer:
4^9
Step-by-step explanation:
#9
3/8 x 4/11 = 3/22
#12
9/20 x 4/5 = 9/25
Answer:18
Step-by-step explanation: pluging in -b/2a for first equation you get 3 plunging 3 in you get 6 solving for second equation you get -x^2+6x+3 pluging in -b/2a you get 3 then plugoing into equation you get 12 12-(-6)=18
X=2 Y=-4.5 I got this by substituting the value of x into the equation 3(2y+7)-2y=3 and solving.
This is simple sis
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