2x+12=4x
Make two equations, and solve for x.
1. 2x+12= 4x 2. 2x+12= -4x subtract 2x from both sides
12=2x 12= -6x
6=x -2=x
plug in the x values to know if they are the solution for the eqaution.
2(6) +12= 4(6) 2(-2) +12= -4(-2)
12+12= 24 -4+12=8
24=24 8=8
The equation is true, it's all real numbers or infinite solutions.
Answer:
a) v(t) = 14-2t.
b) The particle is moving in a positive direction in the interval [0,7) and it's moving a negative direction in the interval
c) the particles changes direction at t=7.
Step-by-step explanation:
Recall that . We will assume that whenever its velocity is positive, it is moving in a positive direction and that whenever the velocity is negative, it is moving in a negative direction. We know that the particle changes direction when the velocity passes from positive to negative or viceversa, as t goes by.
To calculate the velocity (t), we will derivate s(t) with respect to t. Recall that given a functio of the form its derivative is . Thus, using the properties of derivatives we get that
.
We can see that 14-2t>0 if 14>2t which is equivalent that 7>t. So the particle moves in a positive direction whenever . On the same way, 14-2t<0 when t>7 ( and it changes direction at t=7 since it passes from positive to negative.
500 milligrams are in one half gram
Answer:
35. there is .25 chance. there are 12 tiles 3 are green so that is 1/4 of the tiles.
36. 1.5 inches for each spring. divide 450 by 300