Solve the system of linear equations using matrices.
A. (12, -2)
B. (-2, 3)
C. (7, 12)
D. (3, 7)
Answer: A
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Simplify the difference quotients 
and 
for the following function. Rationalize the numerator when necessary.f(x) = - 
A. 
; 
B. 
; 
C. 
; 
D. - 
; - 
Evaluate the expression.
A. 
B. - 
C. 1
D. 
Solve the problem.Yosemite Falls in California consists of three sections: Upper Yosemite Fall (by itself one of the ten highest waterfalls in the world), the Middle Cascade, and Lower Yosemite Fall. From a footbridge across the creek 2500 feet from the falls, the angles of elevation to the top and bottom of Upper Yosemite Fall are 45.74° and 24.42°, respectively. How high is the total series of three falls? How high is Upper Yosemite Fall? Round your answers to the nearest foot.
Fill in the blank(s) with the appropriate word(s).
Expand the expression using the Binomial Theorem.(x2 + 5y)4
A. x8 + 15x6y + 150x4y2 + 375x2y3 + 625y4 B. x6 + 15x5y + 150x4y2 + 375x2y3 + 625y4 C. x8 + 20x6y + 150x4y2 + 500x2y3 + 625y4 D. x6 + 20x5y +30x4y2 + 20x2y3 + 5y4