Which is an example of an expression? 7 + d = 56

x - 6 = 23

6n = 34

c + 8

I need an explanation of this and I will mark brainliest

The jones farm has 24 cows that each produce 52 quarts of milk a day. how many quarts are produced each day altogether

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?