State whether the parabola opens upwards or downwards.y = 
x2 - 3
A. Upwards
B. Downwards
Answer: A
Mathematics
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Evaluate the expression using the given values.3xy - 
; x = 21, y = -5
A. 323 B. -325 C. -323 D. 325
Mathematics
Simplify the expression by using the order of operations.7 ? 6 + 7 ? 4 + 4
A. 1180 B. 296 C. 728 D. 74
Mathematics
Solve the equation.4x = 
A. 
B. 
C. 
D. 
Mathematics
Decide whether or not the matrices are inverses of each other.
and 
A. Yes B. No
Mathematics