25 pts. stumped. Match each expression in column A with an equivalent expression from column B. Show or explain your reasoning. Column A
a. 12r+t−4r+6t
b. (12r+2t)−(4r+10t)
c. 12(r+t)−6(r+t)+4(r+t)−2(r+t)
Column B
1. 8(r−t)
2. 8(r+t)
3. 8r+7t

The table shows the distance traveled over time while traveling at a constant speed.

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.

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation