Answer:
![y=-3](https://tex.z-dn.net/?f=y%3D-3)
Step-by-step explanation:
Given Equation:
y=? at x= 1
Putting the given value of 'x' in the equation:
![9(1) +7y=-12\\\\9+7y=-12\\\\7y=-12-9\\\\7y=-21\\\\y=-\frac{21}{7} \\y=-3](https://tex.z-dn.net/?f=9%281%29%20%2B7y%3D-12%5C%5C%5C%5C9%2B7y%3D-12%5C%5C%5C%5C7y%3D-12-9%5C%5C%5C%5C7y%3D-21%5C%5C%5C%5Cy%3D-%5Cfrac%7B21%7D%7B7%7D%20%5C%5Cy%3D-3)
At
, the value of y is ![y=-3](https://tex.z-dn.net/?f=y%3D-3)
Answer:
5
Step-by-step explanation:
Answer:
86.4
Step-by-step explanation:
72x.20= 14.4
72+14.4=86.4
I'm pretty sure this is right
Answer:
When increasing the radius 3 times the volume increases 9 times and when it is reduced to a third the volume decreases 9 times
Step-by-step explanation:
We have that the formula for the volume of a cone is:
Vc = pi * (r ^ 2) * h
We first calculate the original volume, where the radius is 2 and the height is 9, replacing:
Vc = 3.14 * (2 ^ 2) * 9
Vc = 113.04
Now if the radius is tripled it would be: 2 * 3 = 6, the radius would be 6, replacing:
Vc = 3.14 * (6 ^ 2) * 9
Vc = 1017.36
If we compare:
1017.36 / 113.04 = 9
This means that when the radius is tripled, the volume increases 9 times.
When if re reduces to a third the radius would be: 2/3, replacing:
Vc = 3.14 * ((2/3) ^ 2) * 9
Vc = 12.56
113.04 / 12.56 = 9
Which means that by reducing it to a third the volume becomes 9 times smaller.
Answer:
96.7 maybe or 6.75 or 5.67 or even 56.77
Step-by-step explanation:
EZ