Solve the system by substitution. -4x + 8y = 56 x + 7y = 49
A. No solution
B. (0, 7)
C. (1, 6)
D. (-7, 0)
Answer: B
Mathematics
You might also like to view...
Solve.A window is in the shape of a square topped by a semicircle. The side of the square is x cm and the window cannot be wider than 140 cm. Find the function for the perimeter of the window and the domain of the function.
A. P = 3x + 
?x : 0 < x ? 140
B. P = 4x + ?x : 0 < x ? 140
C. P = 4x + 
?x2 : 0 < x ? 140
D. P = 3x + 
?x2 : 0 < 140 ? x
Mathematics
Find the greatest common factor of the set of numbers. 42, 56, and 98
A. 1 B. 42 C. 14 D. 7
Mathematics
Solve the problem.If f(x) = 
, f(4) = 0, and f(9) is undefined, what are the values of A and B?
A. A = 9, B = 4 B. A = -4, B = -9 C. A = 4, B = 9 D. A = -9, B = -4
Mathematics
Find the principal square root.
A. -0.5 B. 0.5 C. 1 D. 0.1
Mathematics