Negative four times a number plus nine is no more than the number minus twenty one
2 answers:
4x+9 =< x-21
<span>-4x-x +9 =< x-x-21 </span>
<span>-5x +9 =< -21 </span>
<span>-5x +9-9 =< -21-9 </span>
<span>-5x =< -30 </span>
<span>-5x/-5 =< -30/-5 (DANGER divide by neg affects direction of inequality) </span>
<span>x =< 6 </span>
<span>CHECK sign </span>
<span>-4x+9 =< x-21 </span>
<span>-4*6+9 =< 6-21 </span>
<span>-24+9 =<-15 </span>
<span>-15 =<-15 </span>
<span>-4*7+9 =< 7-21 </span>
<span>-28+9 =< 7-21 </span>
<span>-19 =< -14 false </span>
<span>-4*5+9 =< 5-21 </span>
<span>-20+9 =< -16 </span>
<span>-11 =< -16 true </span>
<span>so </span>
<span>x =< 6 is correct. </span>
<span>I use =< since eq would NO MORE THAN.</span>
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Answer:
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=20\4 +8
=5+8
=13 using bodmas will get u 13 and 13 is the answer
ally’s answer is sometimes true. -6.2+5.71=-11.91 5.71+-6.2=11.91 5.72-2.84=2.99
