What is the lcd of 3/10 and -4/15?

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

Whose conclusion is correct? choose all that apply. (two max) elijah emily edward esme

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list