How many solutions does this linear system have? y =2/3 x+ 2 6x – 4y = –10

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m