Translate the question into an equation. Do not solve.What number is 90% of 19?
A. x ? 90 = 19
B. x = 90 ? 19
C. x ? 90% = 19
D. x = 90% ? 19
Answer: D
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Solve.How many 4-letter codes can be formed with the letters 
with repetition?
A. 336 B. 56 C. 4096 D. 240
Graph the equation in the rectangular coordinate system.3x = 3
A. 
B. 
C. 
D. 
Evaluate the algebraic expression.b - 4.1, for b = 4.1
A. 0 B. -8.2 C. 8.2 D. -4.1
Determine i) the domain of the function, ii) the range of the function, iii) the domain of the inverse, and iv) the range of the inverse.f(x) = -7x - 4
A. f(x): D is all real numbers, R = {y|y > -4}; f-1(x): D is all real numbers, R = {y|y < -4} B. f(x): D = {x|x > -7}, R = {y|y > -4}; f-1(x): D = {x|x < -7}, R = {y|y < -4} C. f(x): D is all real numbers, R is all real numbers; f-1(x): D is all real numbers, R is all real numbers D. f(x): D = {x|x > -7}, R is all real numbers; f-1(x): D = {x|x < -7}, R is all real numbers