The x stands for the number of beaded bracelets that she sells. For the profit, you need to use total income minus total costing of materials.
The model shows 5 groups of 3. Because there are 3 bars in 5 groups. I hope this helped!!
I know it's late but,
25 ft ÷ 4 cm = 6.25
500 ÷ 6.25 = 80
750 ÷ 6.25 = 120
and so your answer is C.<span> 80 centimeters by 120 centimeters
and again sorry it's late :D</span>
Answer:
t = 3.5 sec
Step-by-step explanation:
The equation that represents the position of the ball as a function of time is the following:
Where:
= Initial position of the ball (4 feet tall)
= Initial speed of the ball (55feet / s)
a = acceleration (9.8
, or in this case 32.16
)
t = time in seconds
Then we want to know how long it takes to get to the ground, for this we equal h (t) = 0 and clear t.
So:
![0 = 4 + 55t -16.08t ^ 2](https://tex.z-dn.net/?f=0%20%3D%204%20%2B%2055t%20-16.08t%20%5E%202)
Solving the second degree equation we have:
![\frac{-55+\sqrt{55^2-4 (-16.08) 4}}{2 (-16.08)}= -0.0712\\\frac{-55-\sqrt{55^2-4 (-16.08) 4}}{2 (-16.08)} = 3.492](https://tex.z-dn.net/?f=%5Cfrac%7B-55%2B%5Csqrt%7B55%5E2-4%20%28-16.08%29%204%7D%7D%7B2%20%28-16.08%29%7D%3D%20-0.0712%5C%5C%5Cfrac%7B-55-%5Csqrt%7B55%5E2-4%20%28-16.08%29%204%7D%7D%7B2%20%28-16.08%29%7D%20%3D%203.492)
t = -0.071 sec
t = 3.5 sec
We must take the positive solution.
So:
t = 3.5 sec