. Leon wrote an expression that is equivalent to (30 + 6) ÷ 12. Which expression could be the one Leon wrote?
36 ÷ 3 ⋅ 4
(3 ⋅ 3 ⋅ 4) ÷ 4 ⋅ 3
5 ⋅ 6 + 2 ⋅ 3 ÷ 3 ⋅ 2 ⋅ 2
(3 ⋅ 3 ⋅ 2 ⋅ 2) ÷ (3 ⋅ 2 ⋅ 2)
(i need help STAT)

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.