Answer:
129
Step-by-step explanation:
there is a sequence of 9 to each
Answer:81
Step-by-step explanation:
Because the square root of 81 is 9 which is a perfect square
Answer:
2/5
Step-by-step explanation:
make it reciprocal
2x/5 = 4/25
cross multiply the numbers
2x × 25 = 4×5
2x= 20/25
2x= 4/5
x = 2/5