Use the substitution method or the elimination method to solve the system. If the system has infinitely many solutions, express the ordered pair in terms of x or y. 7x - 7y = 6-14x + 14y = -24
A. (7, 6)
B. no solution
C. 
D. (2, 4)
Answer: B
Mathematics
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Express the number in scientific notation.0.0000000431019
A. 4.31019 × 10-9 B. 4.31019 × 10-8 C. 4.31019 × 10-7 D. 4.31019 × 108
Mathematics
Solve the problem.If an object is thrown upward with an initial velocity of 11 feet per second, then its height (in feet) is given by 
after time t seconds. What is its maximum height?
A. 33 ft B. 99 ft C. 121 ft D. 124 ft
Mathematics
Solve the equation.3(2z - 4) = 5(z + 5)
A. {16} B. {13} C. {-13} D. {37}
Mathematics
Factor, if possible.5x2 + 31x + 30
A. (5x - 6)(x + 5) B. (5x + 6)(x + 5) C. (x + 6)(x + 5) D. (5x - 6)(x - 5)
Mathematics