Answer:
a
Step-by-step explanation:
The standard form of the equation of a circle is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
Here (h, k) = (0, 0), thus
(x - 0)² + (y - 0)² = r², that is
x² + y² = r² → a
Step 1: Obtain the difference vector
AB= (0-0, 0-6, 8-0)=(0, -6, 8)
it size (module) is the distance between A and B
Step 2: Add-Up the squares of its components: 0^2+(-6)^2 + 8^2=100
Step3: Extract the squareroot of the above: sqrt(100)=10
Voilá!
Let's isolate x by moving the -1 to the left and the 3/2x to the right (direction chosen so that you don't get negative numbers):
Now multiply both sides by 2 and swap sides:
She can run 10.66666666666667 mi in 60 min
Answer:
14. 6
15. 6
Step-by-step explanation: