Let x be a number. Translate the following into an expression or an equation, as appropriate, and then simplify the expression or solve the equation.One-half a number, minus eight, plus four times the number
A. 
x - 4
B. 
x - 4
C. 
x - 8
D. 
x - 8 + 4x
Answer: C
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Simplify.
A. 
B. 
C. 
D. 
Evaluate the algebraic expression for the given values of the variables.
for x = 6, y = 7, and z = 4
A. 210 B. 840 C. 836 D. 30
Convert to a logarithmic equation.4-2 = 
A. -2 = log4 
B. 
= log4 -2
C. 4 = log-2 
D. -2 = log1/16 4
Solve the problem.Ken is 6 feet tall and is walking away from a streetlight. The streetlight has its light bulb 14 feet above the ground, and Ken is walking at the rate of 4.3 feet per second. Find a function, d(t), which gives the distance Ken is from the streetlight in terms of time. Find a function, 
, which gives the length of Ken's shadow in terms of d. Then find 
. What is the meaning of 
?
A. (S ? d)(t) gives the length of Ken's shadow in terms of time. B. (S ? d)(t) gives the length of Ken's shadow in terms of his distance from the streetlight. C. (S ? d)(t) gives the time in terms of Ken's distance from the streetlight. D. (S ? d)(t) gives the distance Ken is from the streetlight in terms of time.