4/5 + 2/3 =
1 1/2-2/6=

22/15

7/6

Step-by-step explanation:

Have a blessed day

4/5 + 2/3= 1 7/15

1 1/2-2/6= 1 1/6

Step-by-step explanation:

1. 4/5 × 3 = 12/15

2/3 × 5 = 10/15

12/15 + 10/15 = 22/15= 1 7/15

2. 1 1/2×3= 1 3/6

1 3/6-2/6= 1 1/6

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4