Solve the exponential equation.21x = 10-4x
A. 84
B. -4
C. 21
D. 0
Answer: D
Mathematics
You might also like to view...
Perform the indicated operation. Write the answer in scientific notation.(8.64 × 10-4) ÷ (4.5692 × 105) Give the answer to three significant digits.
A. 1.8909 × 101 B. 1.89 × 101 C. 1.89 × 10-9 D. 1.8909 × 10-9
Mathematics
Solve the problem.Over the past two weeks, Jane earned $260 and $282 respectively, at her part time job. What must she earn in the third week to bring her three-week average earnings to $250 per week?
A. $250 B. $271.00 C. $396.00 D. $208.00
Mathematics
Find the midpoint of the line segment joining the two points.(7
, - 
) and (-
, 0)
A. 
B. ( -5, 10)
C. 
D. 
Mathematics
If m?A+m?B+m?ACB =180°, what is the measure of each angle?
Mathematics