90 seconds to 7 minutes as ratio in its simplest form

3 seconds: 14 seconds

Step-by-step explanation:

90:7

let's turn everything into seconds

90:420

take the zero out

9:42

divide by 3

3:14

this is the simplest form

simplest form is 3/14

Step-by-step explanation:

First we have to convert 7 into min

60× 7= 420

90/430 = 9/42

÷ 3= 3/14

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6