Multiply.(x + 9)(x - 9)
A. x2 - 81
B. x2 - 18x - 81
C. x2 - 18
D. x2 + 18x - 81
Answer: A
Mathematics
You might also like to view...
Find the indicated term of the sequence.the twenty-first term of -7, -12, -17, ...
A. 98 B. 93 C. -112 D. -107
Mathematics
Solve the equation.x - 9 =
A.
B.
C. {-10, 1}
D. {-1, 10}
Mathematics
Find the first five terms of the geometric sequence.
?
?
A.
B.
C.
D.
E.
Mathematics
Solve the problem.A company installs 5,000 light bulbs. Each bulb has an average life of 500 hours with a standard deviation of 100 hours. The life of each bulb is approximated by a normal curve. Find the number of bulbs that can be expected to last between 290 hours and 540 hours.
A. 1639 bulbs B. 3188 bulbs C. 3190 bulbs D. 1641 bulbs
Mathematics