PLEASE HELP PLEASE EXPLAIN HOW TO SHOW MY WORK TOO

The first is 1/20

b is 1/40

c is 1/15

and d is 1/15

Step-by-step explanation:

To divide a fraction, you change the sign to multiplication and use the recipricol *However you spell that* for the second number (Keep, Change, Flip) and then you multiply the numerators by eachother, and you multiply the denominators by eachother So it would be

1/2 * 1/10=1/20

1/4*1/10=1/40

1/3*1/5=1/15

1/5*1/3=1/15

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.