please tell me how u did this. thanks!
2007-10-11 10:52:17 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
if 2t+3=-9
then 2t= -9 -3
2t= - 12
t=-12/2
t=-6
then value of -3t-7 is
-3(-6)-7
18-7=11
2007-10-11 10:58:14 · answer #1 · answered by freeky 1 · 0⤊ 0⤋
2t + 3 = -9 subtract 3 from both aspect 2t = -12 divide both aspect via 2 t = -6 plug back in -3(-6) - 7 multiply first 18 - 7 simplify 11 finish reply -3t - 7 = 11 minx, a extra answerer, is mistaken he forgot to divide each component via 2 even as fixing for t minx now has consistent it ?, a extra answerer, is mistaken he forgot that -3 sped up via -6 produces a powerful product (18)
2016-10-20 06:47:34 · answer #2 · answered by rothi 4 · 0⤊ 0⤋
11
2007-10-11 11:00:42 · answer #3 · answered by Anonymous · 0⤊ 0⤋
11
2007-10-11 10:58:01 · answer #4 · answered by Mister2-15-2 7 · 0⤊ 0⤋
Subtract 3 from -9 to get -12, then divide by 2 which makes t= -6. Plug -6 into the other equation. -3 x -6 = 18, then subtract 7 to get 11.
2007-10-11 10:59:53 · answer #5 · answered by Anonymous · 0⤊ 0⤋
2t = - 12
t = - 6
- 3t - 7
= 18 - 7
= 11
2007-10-13 06:33:56 · answer #6 · answered by Como 7 · 0⤊ 0⤋
2t + 3 = -9
2t=-9-3
2t=-12
t=-12/2=-6
-3t -7=-3*-6-7=18-7=11
2007-10-11 10:58:47 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Well first you find the value of t in the first equation and whatever you get substitute it in for -3t. That should help.
2007-10-11 11:00:51 · answer #8 · answered by Anonymous · 0⤊ 0⤋
u minus 3 from -9 to get neg 6 then divide by 2 and get three then plug in three for the t in the second equation and bam
2007-10-11 10:56:24 · answer #9 · answered by Mr. Computer 1 · 0⤊ 0⤋
that means that the value of t is -6 see 2 x -6 is -12 +3= -9
so if t still = -6 i THINK it's -3 x-6-7
18-7=11
so i dunno i think thats it
sorry if it's not
2007-10-11 11:00:09 · answer #10 · answered by jewlz 2 · 0⤊ 0⤋