Expand, where i2 = -1.(7 + i)4
A. 1400 + 2696i
B. 2696 + 1400i
C. 2108 + 1344i
D. 1344 + 2696i
Answer: C
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Solve.Linda bought a parcel of land for $70,000. Its value is expected to increase by about $600 per year. Her sister, Sally, bought a house for $230,000. The value of Sally's house is expected to increase by about $1700 per year. Write an expression that represents the combined value of Linda's land and Sally's house after x years.
A. (2300x + 300,000) dollars B. (70,600 + 231,700x) dollars C. (70,600x + 231,700) dollars D. (300,000x + 2300) dollars
Write an equivalent rational expression with the given denominator.
with denominator 4m2
A. 
B. 
C. 
D. 
Water flows from a tank of constant cross-sectional area 50 
through an orifice of constant cross-sectional area 1/4 located at the bottom of the tank. Initially, the height of the water in the tank was 20 ft, and t sec later it was given by the equation 
. How fast was the height of the water decreasing when its height was 2 ft?
a. 
ft/sec
b. 2/25 ft/sec
c. 
ft/sec
Provide an appropriate response.A line passes through the points (7, 1) and (1, 1). The equation of this line is ? . The slope of the line is ? .
A. x = 1; undefined B. x = 1; 0 C. y = 1; 0 D. y = 1; undefined