Solve each question
-2+| b+7 |=8

| b+7 | = 10; you add 2 on both sides.

| b+7 | is always positive

b+7 = 10, b = 10-7= 3.

therefore b = 3

if you use photomath right away it will give you the answer not like this app that you have to wait for people.

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)