Use substitution to solve the system of equations.x + 3y = -3-2x + 4y = -4
A. (0, -1)
B. (1, 0)
C. Inconsistent; no solutions
D. (1, -2)
Answer: A
Mathematics
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Solve the problem.Molly has $13.30 in coins. She has five more nickels than dimes. She has seven fewer quarters than dimes. How many quarters does she have?
A. 42 quarters B. 37 quarters C. 30 quarters D. 35 quarters
Mathematics
Solve the equation.(x + 6)(x - 1) = (x + 1)2
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.(10 - 0.8x)(5 - 0.4x) = 0
A. 10, 5 B. 12.5, 12.5 C. 12.5, 0.2 D. 0.8, 5
Mathematics
Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.4x2 + 4xy + 4y2 - 8x + 8y = 0
A. x = 
(x' - y') and y = 
(x' + y')
B. x = -y' and y = x'
C. x = 
x' - 
y' and y = 
x' + 
y'
D. x = 
x' - 
y' and y = 
x' + 
y'
Mathematics