1 What system of equations is represented by the matrix
40
9 1
1]
\ i]
2
O
A. -X + 4 = 0
x + 9 = 1
O B. -x + 4y = 0
X + 9y + z = 0
O C. -x + 4y = 0
2x + 9y = 1
O
D. -x + 4y = 0
2x + 9y = 2

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Arational number that is equivalent to -20/4?