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>
You might be interested in
Answer:
ask the internet this question sorry not being rude its becausd no ones answered it
Answer:
C 2(z+3)
Step-by-step explanation:
z+(z+6)
Combine like terms
2z+6
We can factor out a 2 from each term
2(z+3)
Since all straight lines have an angle of 180 degrees if the exterior angle is equal to 113 degrees than you just subtract 113 from 180 which will equal 67.
Hundredths place=9 Ones place=6
1 - 8 = - 7 6 - 1 = 5 Let us use the Pythagorean theorem: c^2 = (-7)^2 + 5^2 = 49 + 25 = 74 -> c = 8.6