What is the measure of the missing angel ?

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24