Solve the equation.21 = z - 25
A. z = 46
B. z = 4
C. z = -4
D. z = -46
Answer: A
Mathematics
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Identify the number represented on the abacus.
A. 49,392 B. 45,352 C. 40,302 D. 432
Mathematics
Add or subtract as indicated. Simplify, if necessary.- 
+ 
A. 0
B. 1
C. -1
D. 
Mathematics
Solve the following system by any appropriate method. If there is no real number solution, so state.x2 + 5y2 = 4x2 - 5y2 = 8
A. (
, 
), (
, -
), (-
, 
), (-
, -
)
B. (
, 
), (-
, -
)
C. (
, 
), (
, -
)
D. no solution
Mathematics
Find the vertices of the hyperbola.4y2 - 36x2 = 144
A. (0, 6), (0, -6) B. (-2, 0), (2, 0) C. (0, 2), (0, -2) D. (-6, 0), (6, 0)
Mathematics