On the album 1989 by taylor swift, blank space is 12 seconds longer than shake it off. if the combined time of the two songs is 7 minutes and 30 seconds, how long is shake it off? give your answer in minutes and seconds.

Givens:

Lest's call Blank Space and Shake it Off, the relations would be

Now, we replace the first equation into the second equation and solve for :

Then, we replace this value into the first equation

This means that Shake It Off is 204 seconds long and Blank Space is 216 seconds long.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

12/11c

or

12

c

11