Graph a system of equations to approximate the
value of x, the rate of depreciation. Give your
answer as a percent.
A) about 4%
B) about 13%
C)about 1.2
D)cannot be determined

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.