Ellis measured the mass of five samples of quartz. His results were 39.75g., 38.91g, 37,66g, 39.75g, and 39.55g. What was the mean of the samples?

r and t.

both are 64 degrees.

a

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: