The line y=2x+7 meets at rthe y-axis at A.

Write down the co-ordinates of A

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

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.