Answer:
- After 4 seconds the height is 480 meters.
- The maximum height is 484 meters.
- The ball hits the ground after 10 seconds
Step-by-step explanation:
The height after four seconds is h(4) = -16 * r² + 144*4+160 = 480
The maximum height of the ball is the value it takes at its vertex 'v = -b/2a'. In this case a = -16 and b = 144, so the v = -144/-32 = 4.5. The maximum height of the ball as a result is h(4.5) = -16 (4.5)² + 144*4.5 + 160 = 484
To find the moment the ball hits the ground, we need to find when h takes the value 0 by using the quadratic formula, with a = -16, b = 144 and c = 160.
Since t cant take negative values, then the correct value is 10. The ball hits the ground after 10 seconds.
Answer:
6 matches
Step-by-step explanation:
Let’s call the teams A B C D
A will play B C D = 3 matches
B will play only C and D as it already played A, making 2 matches
C will play D, making 1 match
D has already played all
Total number of matches is thus 3 + 2 + 1 = 6 matches
2(2)(-3)(4) - 3(2)(-3)
4(-3)(4) - 6(-3)
-12(4) - (-18)
-48 + 18
-30
Whenever there are two minus signs next to each other, your answer should become a positive. If there is one minus sign and one addition sign, it will stay a negative sign. If there are two addition signs, the addition sign will stay the same.
(-) (-) = +
(-) (+) = -
(+) (-) = -
(+) (+) = +
A line has an arrow on each end of the line. A segment has a dot or point on each end of the line.
