Write an algebraic equation and use it to solve the problem.In 1999, City A experienced 18 armed robberies less than twice that of City B. In the two cities combined, 132 armed robberies occurred. How many armed robberies occurred in City A and in City B?
A. City A: 82 armed robberies; City B: 50 armed robberies
B. City A: 57 armed robberies; City B: 75 armed robberies
C. City A: 58 armed robberies; City B: 38 armed robberies
D. City A: 32 armed robberies; City B: 100 armed robberies
Answer: A
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Find fx, fy, and fz.f(x, y, z) = xz
A. fx = z
; fy = 
; fz = x
B. fx = z
; fy = - 
; fz = x
C. fx = z
; fy = - 
; fz = x
D. fx = z
; fy = 
; fz = x
Solve each problem by estimating.The population of Capital City is 7,985,831 and the population of Spring City is 1,742,652. Round each population to the nearest hundred-thousand to estimate how much larger Capital City is than Spring City.
A. 6,200,000 B. 6,243,000 C. 6,400,000 D. 6,300,000
Evaluate the expression.
A. 1 B. 4 C. 0! D. 6
Find the exact value of y, or state that y is undefined.y = sin-1 
A. 
B. - 
C. 
D. 