rick earns $8.50 per hour at his mother office. He plans on working 12.5 hours this week. How much money will rick earn?
2 answers:
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Answer:
The correct option is C. 9 houses could 18 men paint in 6 hours.
Step by step explanation:
Let the number of houses paint by 18 men in 6 hours be x.
One man can paint one house in 12 hours.
The part of house painted by a man in 1 hour is .
The part of house painted by a man in 6 hour is
The total number of men is 18. Therefore the number of houses painted by 18 men is
Therefore correct option is C. 9 houses could 18 men paint in 6 hours.
Answer:
The equation for this circle is 2c(x²+y²) - 8cx + cy = 0
Step-by-step explanation:
We can solve this problem replacing each of the points in the general equation and then solving the system of equations.
The fact that the circle passes by the point (3,-2) means that when x = 3, y = -2. So:
For (1, -2)
For (0,0)
Now we have to find a,b,c, from the following equations
13a+ 3b - 2c = 0
5a + b - 2c = 0
Since we have variables and 2 equations, i am going to write a and b as functions of c.
13a + 3b = 2c
5a + b = 2c
I will write b in the second equation as a function of a and c, and replace in the first equation
b = 2c - 5a
---------
13a + 3(2c-5a) = 2c
13a + 6cc -15a = 2c
-2a = -4c *(-1)
2a = 4c
a = 2c
-----------
b = 2c - 5a
b = 2c - 5(2c)
b = -8c
The solution for the system is (a,b,c) = (2c, -8c, c). So the equation for this circle is 2c(x²+y²) - 8cx + cy = 0