Solve by the method of elimination by substitution.2x + 2y = 95x + 5y = 10
A. x = 1, y = 1
B. x = 3, y = 5
C. Dependent
D. Inconsistent
Answer: D
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Find the center of mass of a thin plate covering the given region with the given density function.The triangular region cut from the first quadrant by the line y = -x + 7, with density ?(x) = x
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Name the property that justifies the statement. All variables represent real numbers. - 
? 9 = 9 ? 
A. Identity property of multiplication B. Associative property of multiplication C. Commutative property of multiplication D. Inverse property of multiplication
Solve. Write the answer in simplest form.Find the area of the rectangle. Write the answer in simplest form. Recall that the area = (length) ? (width).
A = 
yardB = 5 yards
A. 
square yards
B. 
square yards
C. 2 square yards
D. 
square yards
Decide whether the limit exists. If it exists, find its value.
f(x)
A. -2 B. -1 C. Does not exist D. 0