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

Daniel bought a computer game for $25 and later sold it to thomas for a 40% profit. how much did daniel sell the computer game for?

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?