7) 6x + 16 + = 2x + 28 8) 12x + 12 = 3x + 84
9) 3+ 6x = 2x + 27
10) 8x + 2 = 72 + x
11) 2x + 20 = x + 60
12) 4x + 1 = 25 + 2x

On the april 3 billing date, michaelle chappell had a balance due of $ 1495.39 on her credit card. from april 3 through may 2, michaelle charged an additional $ 305.34 and made a payment of $ 800.a) find the finance charge on may 3, using the previous balance method. assume that the interest rate is 1.8 % per month. b) find the new balance on may 3.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)