Solve the system of equations using substitution.
A. x = 7, y = 8; x = 8, y = 7
B. x = -7, y = -8; x = -8, y = -7
C. x = -7, y = 8; x = -8, y = 7
D. x = 7, y = -8; x = 8, y = -7
Answer: B
You might also like to view...
Add or subtract. Express the answer as a mixed number.16
+ 5
A. 21
B. 20
C. 22
D. 16
Provide an appropriate response. Determine the degree measure of ? if cos ? = 0.7022 in degree, minute, second rounded to the nearest second.
A. 45° 39' 62" B. 44° 36' 13" C. 45° 23' 46" D. 0° 47' 32"
Solve the problem.Assume that the price per unit d of a certain item to the consumer is given by the equation 
where x is the number of units in demand. The price per unit from the supplier is given by the equation 
where x is the number of units supplied. Find the equilibrium price and the equilibrium quantity.
A. equilibrium price: $35 per unit; equilibrium quantity: 50 units B. equilibrium price: $50 per unit; equilibrium quantity: 30 units C. equilibrium price: $20 per unit; equilibrium quantity: 50 units D. equilibrium price: $30 per unit; equilibrium quantity: 50 units
Assume that the domain of f is the set A = {-5, -3, 0, 3, 5}. Determine the set of ordered pairs that represents the function f. ? f(x) = x2 ?
A. {(-5, 25), (-3, 81), (0, 0), (3, 81), (5, 25)} B. {(-5, -125), (-3, 9), (0, 0), (3, 9), (5, -125)} C. {(-5, 25), (-3, -27), (0, 0), (3, -27), (5, 25)} D. {(-5, 625), (-3, 9), (0, 0), (3, 9), (5, 625)} E. {(-5, 25), (-3, 9), (0, 0), (3, 9), (5, 25)}