Find the unknown side of the right triangle. Use a calculator or square root table when necessary and round to the nearest thousandth.
20 cm
A. 19 cm
B. 724 cm
C. 362 cm
D. 26.907 cm
Answer: D
Mathematics
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Write a matrix equation equivalent to the system of equations.9x - 8y + 10z = 3-3x + 9y - 7z = 9
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent.John Lee's savings account has a balance of $2183. After 27 months, what will the amount of interest be at 6.8% per year?
A. $80.85 B. $148.44 C. $175.45 D. $334.00
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Write the number in standard form.7.21 × 10-4
A. -721,000 B. 0.0000721 C. 0.00721 D. 0.000721
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Find the standard form of the equation of the ellipse with foci: (±8, 0) and major axis length of 22.
a. 
b. 
c. 
d. 
Mathematics