Answer: x=-3
Step-by-step explanation:
F(x)=9x^2-54x-19
F(x)=(x-57)(x+3)
X=57 X=-3
Answer:
60
Step-by-step explanation:
Hello,
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Answer B
(x^3-2^3=(x-2)(x²+2x+4)
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Answer:
Part 1) ![180\ hours](https://tex.z-dn.net/?f=180%5C%20hours)
Part 2) There are about ![298\ catfish](https://tex.z-dn.net/?f=298%5C%20catfish)
Step-by-step explanation:
Part 1) we know that
1 month=4 weeks
Let
x------> the number of hours of practice for three months
so
Convert months to weeks
3 months=3(4)=12 weeks
using proportion
![\frac{45}{3}\frac{hours}{weeks} =\frac{x}{12}\frac{hours}{weeks}\\ \\ x=45*12/3\\ \\x=180\ hours](https://tex.z-dn.net/?f=%5Cfrac%7B45%7D%7B3%7D%5Cfrac%7Bhours%7D%7Bweeks%7D%20%3D%5Cfrac%7Bx%7D%7B12%7D%5Cfrac%7Bhours%7D%7Bweeks%7D%5C%5C%20%5C%5C%20x%3D45%2A12%2F3%5C%5C%20%5C%5Cx%3D180%5C%20hours)
that means------> In three months (12 weeks) the pianist practice 180 hours
Part 2)
Let
x------> the number of bass
y------> the number of catfish
we know that
Using proportion
![\frac{10}{7}\frac{bass}{catfish} =\frac{425}{y}\frac{bass}{catfish} \\ \\y=425*7/10\\ \\y=297.5\ catfish](https://tex.z-dn.net/?f=%5Cfrac%7B10%7D%7B7%7D%5Cfrac%7Bbass%7D%7Bcatfish%7D%20%3D%5Cfrac%7B425%7D%7By%7D%5Cfrac%7Bbass%7D%7Bcatfish%7D%20%5C%5C%20%5C%5Cy%3D425%2A7%2F10%5C%5C%20%5C%5Cy%3D297.5%5C%20catfish)
There are about ![298\ catfish](https://tex.z-dn.net/?f=298%5C%20catfish)
Constant is 4. 7a has a variable so that can’t be a constant value. The only option left in the expression is 4