Solve the system.x - 5y = 9-3x + 15y = - 27
A. 
B. 
C. ?
D. 
Answer: B
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Solve the problem.If a rock falls from a height of 30 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 30 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 1.12 sec B. 6.12 sec C. 2.47 sec D. 1.25 sec
Find the real solutions of the equation.3x4 - 28x3 + 102x2 - 148x + 39 = 0
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B. 
C. 
D. 
Find the slope then describe what it means in terms of the rate of change of the dependent variable per unit change in the independent variable.The linear function f(x) = 3.8x + 33 represents the percentage of people, f(x), who graduated from college x years after 1998.
A. m = 3.8; the percentage of people graduating from college has increased at a rate of 3.8% per year after 1998. B. m = -3.8; the percentage of people graduating from college has decreased at a rate of 3.8% per year after 1998. C. m = 3.8; the percentage of people graduating from college has decreased at a rate of 3.8% per year after 1998. D. m = 33; the percentage of people graduating from college has increased at a rate of 33% per year after 1998.
Use the compound-interest formula to find the account balance with the given conditions: P = principal, r = interest rate, t = time, in years.P = $1700, t = 6, r = 5% compounded daily
A. $229.47 B. $2294.71 C. $34,075.39 D. $2293.33