15 and 25 least common multiple im confused on this 3/7+6/11= 1/3 + 3/4= 4/5 + 3/7= 7/12-1/8= 9/10 -2/3= i can get the answers i just need some one to do an addtion one and subtracting one and show me how

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.