Answer:
12
Step-by-step explanation:
8 white marbles and 48 marbles
each sample contains 2 white
so first
8 divide 2 = 4
then second
48 divide 4= 12
hope this helps
7
49
Answer:
radius = 7 units
Step-by-step explanation:
We are given the equation;
x² - 10x + y² - 10y = -1
We are required to determine the radius of the circle;
We are going to use completing square method to solve for the radius and the center of the circle.
First we make sure the coefficient of x² and y² is 1
x² - 10x + y² - 10y = -1
Then we add the square of half the coefficient of x and y on both sides of the equation;
That is;
Simplifying the equation, we get;
Thus;
That is;
The equation of a circle is written in the form of;
Then (a, b) is the center and r is the radius.
Therefore;
In our case;
Then, center = ( 5, 5)
radius = √49
= 7 units
Negative 9 (two-thirds x) minus 9 (1)
Negative 9 (two-thirds x) + 1
–6x + 1
–6x + 9
–6x – 9
Answer: the correct answer is B and F
Step-by-step explanation: