If you are talking about real number system then -X equals -80.
Else, if you are talking about vectors then -X will be another vector of magnitude 80, which will act along a direction just opposite to X (i.e., making an angle 180 degree with X).
80
0.05 x 80 = 4
x2 = -80 x = (+/-)(-80).5 = (+/-)4isqrt(5)
x=5
To find the number that, when multiplied by 7, equals 560, you would divide 560 by 7. This would give you the answer of 80. Therefore, 80 multiplied by 7 equals 560.
80
80=4x, z=6x. find Z. x=80/4, x=20. z=6x20 z=120 answer= 120
Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40
0.05 x 80 = 4
x2 = -80 x = (+/-)(-80).5 = (+/-)4isqrt(5)
x=5
To find the number that, when multiplied by 7, equals 560, you would divide 560 by 7. This would give you the answer of 80. Therefore, 80 multiplied by 7 equals 560.
x2=18x-80 (im guessing you are trying to find x) x2-18x+80=0 (x-10)(x-8)=0 Therefore: x = 10, 8
x = 80
To find this divide 720 by 9 = 720/9 = 80 and you will see that 80 x 9 is indeed 720
.80x=150 divide both sides by .80 x=150/.80=187.5
4 x 20 = 80