Find the cross-product and determine whether the proportion is true or false.
= 
A. 0.288 ? 0.36; false
B. 0.24 ? 0.432; false
C. 0.288 = 0.288; true
D. 0.36 = 0.36; true
Answer: A
Mathematics
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Express the number in standard notation.4.7980 × 105
A. 239.9 B. 4,798,000 C. 479,800 D. 47,980
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Solve the system of equations. If the system is dependent, express solutions in terms of the parameter z. x + y + z = -7 x - y + 4z = -95x + y + z = -19
A. (-2, -2, -3) B. (-3, -2, -2) C. No solution D. (-2, -3, -2)
Mathematics
Rationalize the denominator. If any variables are present, assume that they represent nonnegative numbers, and assume that the denominator is not zero.
A. 
B. 
C. 
D. 
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Graph the inequality.y < -5
A. 
B. 
C. 
D. 
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