If 1 is subtracted from the numerator and from the denominator of a fraction, the value obtained
is If 1 is added to its numerator and to its denominator, the resulting value is 2/3.
Find the fraction.

-2 is the right

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours

you have 6 equal triangles, find the area of one of them (b*h/2) and multiply by 6

(8*4: 2)*6 =

32 cm² is your answer

example answer: "to determine if a sum is reasonable you can round each number to the nearest whole and compare the estimated sum to the actual sum."

hope this you and anyone else who needs the answer : ^)