26x3=78
78-x=72
x=6
She needs to buy at least 6 more to have enough for 26 students
Answer:
because it has two parts
Step-by-step explanation:
thats what the first one is
Answer:
(a) Circle Q is 9.4 units to the center of circle P
(b) Circle Q has a smaller radius
Step-by-step explanation:
Given


Solving (a): The distance between both
The equation of a circle is:

Where


P and Q can be rewritten as:


So, for P:


For Q:


The distance between them is:

Where:
--- 
--- 
So:





Solving (b): The radius;
In (a), we have:
--- circle P
--- circle Q
By comparison

<em>Hence, circle Q has a smaller radius</em>
Answer:
348 hrs
Step-by-step explanation:
Hours of football practiced altogether = sum of hours practiced on friday and Saturday
Therefore
125 + 223
= 348 hrs