![-750x^2+15000x](https://tex.z-dn.net/?f=-750x%5E2%2B15000x%3C0%5C%5C%0A-750x%28x-20%29%3C0%5C%5C%0Ax%5Cin%28-%5Cinfty%2C0%29%5Ccup%2820%2C%5Cinfty%29%0A)
But x must be a natural number, so the answer is
![x>20](https://tex.z-dn.net/?f=x%3E20)
.
Answer:
70 gallons
Step-by-step explanation:
x gallon of 50%
x * 0.5 + 70 * 0.3 = (x + 70) * 0.4
0.5x + 21 = 0.4x + 28
0.1x = 7
x = 70
Answer: $21,000
Step-by-step explanation:
Cleaning expense is only related to the floor space occupied by the department.
If the company spend a total of $30,00 on cleaning each year.
And Department B occupies 70% of the company floor.
Therefore, the company spends 70% of their cleaning expense on department B
Hence, the cleaning expense on department B is given as;
= 70% of $30,000
= $21,000
Answer:
B) y=x+2; y=5
Step-by-step explanation:
Part 1:
(x+30)(x)=1800
<span>x(x+30)=1800
</span>
Part 2:
<span>x+30)(x)=1800</span>
Distribute the x.
<span><span>x2</span>+30x=1800</span>
Subtract 1800 from both sides.
<span><span><span>x2</span>+30x−1800=0</span></span>