Evaluate.7!
A. 720
B. 2520
C. 10,080
D. 5040
Answer: D
Mathematics
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Solve the problem.Martha can rake the leaves in her yard in 8 hr. Her brother can do the job in 7 hr. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 56 hr
D. 3
hr
Mathematics
Solve the system of equations by substitution.
x - y = - 
x + 8y = -4
A. (0, 4) B. (0, -4) C. (-4, 0) D. (4, 0)
Mathematics
Simplify the expression by combining any like terms.2.1c - 4 + 9c - 0.7
A. 18.9c + 2.8 B. 11.1c - 4.7 C. 6.4 D. 2.1c + 9c - 4 - 0.7
Mathematics
Graph the polynomial function. f(x) = 
- 
x4
A. 
B. 
C. 
D. 
Mathematics