Write the phrase as a variable expression. Use x to represent "a number."The difference of a number and 26
A. 26 - x
B. 
C. 26x
D. x - 26
Answer: D
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Determine if the graph of the function opens upward or downward and whether it has a maximum or a minimum point.f(x) = x2 + 2
A. Downward, maximum B. Downward, minimum C. Upward, minimum D. Upward, maximum
Solve the problem.The sum of the measures of the angles of any triangle is 180°. In triangle ABC, angles A and B have the same measure, while the measure of angle C is 45° larger than each of A and B. What are the measures of the three angles?
A. A and C: 70°; B: 55° B. A and B: 45°; C: 90° C. A and B: 55°; C: 70° D. A and B: 90°; C: 45°
Solve the problem.If the average cost per unit C(x) to produce x units of plywood is given by C(x) = 
, what is the unit cost for 20 units?
A. $18.00 B. $15.00 C. $45.00 D. $1.50
Find the exact value of the expression or state that it does not exist.cos 
A. 
B. 
C. 
D. 