A bank contains 15 pennies and 12 nickels. Write
the ratio of nickels to pennies.

4:5

Step-by-step explanation:

Ratio compares two values.  The ratio of nickels to pennies is:

4:5

Explanation:

Nickels:Pennies. That would be 12/15 in a fraction. If you simplify that, you'll get 4/5. 4/5 = 4:5.

the correct answer is 5 6 and 7

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: