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If 2x + 3y = 4 and 5x + 6y = 7, what is the value of 8x + 9y ?
A.) -10 B.) -1 C.) 2 D.) 7 E.) 10
In the standard (x,y) coordinate plane, an equation of a circle is x² + y² = 64. At what points does the circle intersect the y-axis?
A.) (0,1) and (0,-1) B.) (0,8) and (0,-8) C.) (0,9) and (0,-9) D.) (0,10) and (0,-10) E.) the circle does not intersect the y-axis
If f(x) = x² + 3, then f(x + y) = ?
A.) x² + 2xy + y² + 3 B.) x² + 2xy + y² C.) x² + 2xy + 3 D.) x² + 3 + y E.) x² + y² |
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