Find the values of x and y in the two equations below then answer the question that follows.
2^-3=1/x
7^y=1/49
What is the value of xy ?
For the first problem i got 8.
For the second one i got 1/343
I don't know what im doing wrong or right. Can you please show me with work.
3 answers
ive got it ive seen my mistake
Answer is -16 :)
2^-3=1/x
2^3 = x
x = 8, you are correct
7^y=1/49
7^y = 1/7^2
t^y = 7^-2,
thus y = -2
2^3 = x
x = 8, you are correct
7^y=1/49
7^y = 1/7^2
t^y = 7^-2,
thus y = -2
2 answers