two step equations
Answer:
i = 40
Step-by-step explanation:
i/5 + 9 = 17
i/5 = 8
i = 40
So, the answer is i = 40
-2.09 – 6.84i
8.46 + 3.08i
2.09 + 6.84i
Answer:
z = -8.46 - 3.08i.
Step-by-step explanation:
cos 200 = -0.93969 so 9 * cos 200 = -8.46 to the nearest hundredth.
sin 200 = -0.3420 so 9 * sin 200 = -3.08 to nearest hundredth.
58/7 - 22/3
20/21 Fraction form
20/21= 0.95 ( decimal )
I hope that's help and have a great night
Points "in common with the x-axis" are also known as the roots of the quadratic equation . You can apply the quadratic root formula to determine the roots, and also to determine how many such roots there are. With a quadratic (whose graph is a parabola), there can be maximum of 2 roots. But under certain circumstances, there may be only one or no such root.
The root formula for a generic quadratic is as follows:
The expression under the square root is called the determinant. It is called so because it determines the number of real roots. If the determinant value is > 0, there will be 2 roots (and so the parabola will cross the x-axis in 2 points), if its value is =0, there will be only a single root (the the parabola will touch the x-axis in exactly one point), and, finally, if its value is < 0, the quadratic has no real root (andthe parabola will not have any x-intercepts).
So, let's take a look:
This means the parabola will intercept the x-axis at 2 points, two real roots.
Since the coefficient of the quadratic term is positive (a=1), the parabola is oriented "open-up." But since we already know the parabola intercepts in two points, the fact that it is open-up implies now that the vertex must lie below the x-axis (otherwise it could not intercept it).