Write expanded notation.20,650
A. 2 ten thousands + 6 thousands + 5 tens
B. 2 ten thousands + 6 hundreds + 5 tens
C. 2 thousands + 6 hundreds + 5 ones
D. 2 thousands + 6 tens + 5 ones
Answer: B
Mathematics
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Factor when possible.512y3z - z
A. z(8y + 1)(64y2 - 8y + 1) B. z(8y - 1)(64y2 + 8y + 1) C. z(512y - 1)(y2 + 8y + 1) D. z(8y - 1)(64y2 + 1)
Mathematics
Round as indicated.807 to the nearest ten
A. 910 B. 820 C. 800 D. 810
Mathematics
Determine whether the matrices are inverses. 
, 
A. Yes B. No
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.tan ? = 2, cos ? < 0Find sin 
.
A. -
B. 
C. 
D. -
Mathematics