Solve graphically.3x + 4y = 0
A. (-6, 4)
B. (-4, 3)
C. No solution
D. (3, -5)
Answer: B
Mathematics
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Simplify.92 - 5 × 9
A. 324 B. 684 C. 36 D. 144
Mathematics
Divide.
÷ 
A. - 1
B. 
C. - 
D. - 34
Mathematics
Express in scientific notation.490,000
A. 4.9 × 10-4 B. 4.9 × 104 C. 4.9 × 10-5 D. 4.9 × 105
Mathematics
Solve the problem.The hydrogen ion concentration of a substance is about 8.6 x 10-8 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 7.1 B. -8.9 C. 8.9 D. 7.5
Mathematics