Write the expression in the standard form a + bi.(9 + 4i)(9 - 4i)
A. 65
B. 97
C. 81 - 16i2
D. 81 - 16i
Answer: B
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Solve the problem.A gas station sells 4820 gallons of regular unleaded gasoline in a day when they charge $1.35 per gallon, whereas they sell 3938 gallons on a day that they charge $1.40 per gallon. Find a linear equation that relates gallons sold to price. Use this equation to predict the number of gallons sold at a price of $1.24 per gallon.
A. 6769.4 gallons B. 6764.5 gallons C. 6757.1 gallons D. 6760.4 gallons
Decide whether the relation defines a function.y = 
A. Not a function B. Function
Translate to a proportion and solve. What is 2.5% of $124,160?
A. $127,264.00 B. $4966.40 C. $3104.00 D. $49,664.00
Solve using elimination.
A. x = 
, y = ; x = -
, y =
; x = ,
, y = - 
; x = - 
, y = - 
or (
, 
), (- 
, 
), (
, - 
), (- 
, - 
)
B. x = - 
, y = 
; x = - 
, y = - 
or (- 
, 
), (- 
, - 
)
C. x = 
, y = 
; x = - 
, y = 
; x = ,
, y = - 
; x = - 
, y = - 
or (
, 
), (- 
, 
), (
, - 
), (- 
, - 
)
D. x = 
, y = 
; x = ,
, y = - 
;
or (
, 
), (
, - 
)