Solve using the quadratic formula.4x2 - 28x + 40 = 0
A. 2, -5
B. 2, 5
C. -2, 5
D. -2, -5
Answer: B
Mathematics
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Sketch the surface z = f(x,y).f(x, y) = -x2 - y2
A. 
B. 
C. 
D. 
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Write the expression in the standard form a + bi.i6 + i4 + i2 + 1
A. i B. 0 C. -1 D. 1
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors.log3
A. 
log3
B. 2log3x + 6log3y
C. 6log3y - 2log3x
D. 2log3x - 6log3y
Mathematics
Solve the problem.How many different license plates can be made using 3 letters followed by 3 digits selected from the digits 0 through 9, if letters and digits may be repeated?
A. 36 B. 9 C. 17,576,000 D. 260
Mathematics