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.5x + 7y = 225x + 2y = 42
A. ( -10, 5)
B. (-10, 7)
C. (-4, 10)
D. (10, -4)
Answer: D
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Solve the problem.A husband and wife have a 
probability of passing on brown eyes to their children. If they have three children, what is the probability that the children will all have brown eyes?
A. 
B. 
C. 
D. 
Translate to an equation. Do not solve.46% of what is 63?
A. 46% + m = 63 B. 46% × m = 63 C. 46% × 63 = m D. 46% = m × 63
Write the expression in expanded form.log9
3
A. 6 log9(x - 1) - 6 log9(x + 3) B. 3 log9(x - 1) + 3 log9(x + 1) - 6 log9(x + 3) C. 6 log9 x - 6 log9 1 - 3 log9 x - 6 log9 3 D. 3 log9(x - 1) + log9(x + 1) - 2 log9(x + 3)
Solve the problem.A tightrope walker located at a certain point deflects the rope as indicated in the figure. If the weight of the tightrope walker is 130 pounds, how much tension is in each part of the rope? Round your answers to the nearest tenth. 
A. tension in the left part: -261.8 lb; tension in the right part: 219.8 lb B. tension in the left part: -218.7 lb; tension in the right part: 183.6 lb C. tension in the left part: -234.1 lb; tension in the right part: -202.4 lb D. tension in the left part: -286.1 lb; tension in the right part: -247.4 lb