2/7 = x/10
cross multiply:
10 * 2 = 20
7 * x = 7x
7x = 20
x = 2.857
Answer:
The rocket hits the gorund after approximately 10.71 seconds.
Step-by-step explanation:
The height of the rocket <em>y</em> in feet <em>x</em> seconds after launch is given by the equation:

And we want to find the time in which the rocket will hit the ground.
When it hits the ground, its height above ground will be 0. Hence, we can let <em>y</em> = 0 and solve for <em>x: </em>
<em />
<em />
We can use the quadratic formula:

In this case, <em>a</em> = -16, <em>b</em> = 165, and <em>c </em>= 69.
Substitute:

Evaluate:

Hence, our solutions are:

Since time cannot be negative, we can ignore the first answer.
So, the rocket hits the gorund after approximately 10.71 seconds.
Y = 0 so
x^2 + 6x - 40 = 0
(x +10)(x - 4) = 0
x+10 = 0; x = -10
x - 4 = 0; x = 4
answer is C. x = -10 and x = 4
Answer:
A. and E.
Step-by-step explanation:
9(2x + 3)
9 times 2x = 18x 9 times 3 = 27
18x + 27
3(6x+9)
3 times 6x = 18x 3 times 9 = 27
18x + 27
Hope this helps dude ! ^-^
Only three regular polygons tessellate<span>: equilateral triangles, squares, and </span>regular<span>hexagons. </span>No<span> other </span>regular polygon can tessellate<span> because of the angles of the corners of the </span>polygons<span>. ... For </span>regular polygons<span>, that means that the angle of the corners of the </span>polygon<span> has to divide 360 degrees</span>