Simplify the expression without a calculator.
C) 6
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Use a 4-column table to solve.A woman has $1.70 in dimes and nickels. She has 5 more dimes than nickels. How many nickels does she have?
A. 18 nickels B. 8 nickels C. 3 nickels D. 13 nickels
Solve the problem. Write ratios in simplest form.A molecule of ethanol is composed of two atoms of carbon, six atoms of hydrogen, and one atom of oxygen. What is the ratio of oxygen atoms to total atoms in a molecule of ethanol? What is the ratio of carbon atoms to hydrogen atoms?
A. 
; 
B. 
; 
C. 9; 3
D. 1; 3
Solve the system of equations.
A. x = z - 2, and y = -3z - 5, where z is any real number or {(x, y, z) |x = z - 2, and y = -3z - 5, where z is any real number} B. x = 3z + 5, and y = z - 2, where z is any real number or {(x, y, z) |x = 3z + 5, and y = z - 2, where z is any real number} C. x = -3z - 5, and y = z + 2, where z is any real number or {(x, y, z) |x = -3z - 5, and y = z + 2, where z is any real number} D. inconsistent
Solve the problem.A cup of coffee with temperature 105°F is placed in a freezer with temperature 0°F. After 6 minutes, the temperature of the coffee is 65°F. What will its temperature be 14 minutes after it is placed in the freezer? Round your answer to the nearest degree.
A. 27°F B. 32°F C. 34°F D. 29°F