Alberto uses the steps below to solve the equation . 1/2x - 3 = 7 step 1: 1/2x - 3 + 3 = 7 + 3 step 2: 1/2x + 0 = 10 step 3: 1/2x = 10 step 4: 2(1/2)x = 2(10) step 5: 1x = 20 step 6: x = 20 which justifies step 6 of his work? 1.the addition property of equality 2.the identity property of addition 3.the multiplication property of equality 4.the identity property of multiplication

Shane can shovel the driveway in 4 hours, but if his sister it would take 2 hours. how long would it take taylor to shovel the driveway alone

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655