Identify the following as an expression or an equation. -5x + 2 = 
A. Expression
B. Equation
Answer: B
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Find the exact value by using a difference identity.tan 255°
A. 
- 2
B. - 
- 2
C. - 
+ 2
D. 
+ 2
Find the cubic or quartic function that models the data in the table.
(Cubic)
A. y = 0.49x3 - 0.25x2 - 2.83x + 5.00 B. y = 0.49x3 - 0.25x2 + 2.83x + 5.00 C. y = 0.58x3 + 0.25x2 - 2.83x + 5.00 D. y = 0.58x3 - 0.25x2 - 2.83x + 5.00
Use the given information about the polynomial function f(x) to write its complete factored form.Degree 3; zeros: 
, 4, -1; leading coefficient = 1
A. f(x) = 
(x - 4)(x - 1)
B. f(x) = 
(x + 4)(x - 1)
C. f(x) = 
(x + 4)(x + 1)
D. f(x) = 
(x - 4)(x + 1)
Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula 
, as needed.Find [H3O+] if the pH = 1.4.
A. 2.5 × 10-1 B. 4.0 × 10-1 C. 2.5 × 10-2 D. 4.0 × 10-2