Solve the formula for the specified variable.P = a + b + c for a
A. a = 
B. a = b - c - P
C. a = 
D. a = P - b - c
Answer: D
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Solve using the substitution method. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.a + 4b = 23a = -12b + 6
A. (4, 2) B. {(a, b)|a = 4b + 2} C. No solution D. {(a, b)|a + 4b = 2}
Solve the problem.In a certain location, the highest temperature recorded was 100°F. The lowest temperature recorded was 126 degrees less than the highest. What was the lowest temperature?
A. 0°F B. -138°F C. 26°F D. -26°F
Write the polynomial in descending powers of the variable.20 - 2z2 + 7z - 12z4
A. 10z4 + 2z2 - 7z - 20 B. -12z4 - 2z2 + 7z + 20 C. 20 + 7z - 2z2 - 10z4 D. 20 - 12z4 + 7z - 2z2
Find ?y and f '(x) ?x for the given function.y = f(x) = 3x + 2, x = 9, and ?x = 2
A. 10; 10 B. 6; 6 C. 8; 6 D. 10; 6