Solve the problem.Martha can rake the leaves in her yard in 5 hours. Her younger brother can do the job in 7 hours. How long will it take them to do the job if they work together?
A. 
hr
B. 
hr
C. 7 hr
D. 
hr
Answer: B
Mathematics
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Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.10x2 - 4xy + 6y2 - 8x + 8y = 0
A. x = 
(x' - y') and y = 
(x' + y')
B. x = 
x' - 
y' and y = 
x' + 
y'
C. x = 
x' - 
y' and y = 
x' + 
y'
D. x = -y' and y = x'
Mathematics
Graph the function.f(x) = ex - 1
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.Which two of the following equations do not correctly state the relationship between distance, rate and time?(a) 
= r(b) dr = t(c) 
= d(d) 
= t
A. (a) & (c) B. (b) & (d) C. (b) & (c) D. (a) & (d)
Mathematics
Solve.x3 - 8
A. 2, -3 ± i
B. -2, -1 ± i
C. -2, -1 ± 
D. 2, -1 ± i
Mathematics