Solve the system of equations graphically, if a solution exists.4x + y = 6 x + 4y = 9
A. x = -1, y = 2
B. x = 2, y = -2
C. x = 1, y = 0
D. x = 1, y = 2
Answer: D
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Determine how many of the indicated shape there are in the figure.Squares (of any size)
A. 12 B. 8 C. 9 D. 11
Write the following proportion.$66 is to $77 as $78 is to $91
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Translate the ellipse with the given equation so that it is centered at the given point. Find the new equation and sketch its graph.
+ 
= 1; (5, 2)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Dye dilution is a method of measuring cardiac output. If A mg of dye is used and c(t) is the concentration of the dye at time t, then the cardiac output over the time interval [0, T ] is given by
Find the cardiac output over the time interval [0, 15] if the dye dilution method is used with mg
of dye and the dye concentration, in mg/L, is modeled by
where t is measured in seconds.