Eliminate the parameter t. Find a rectangular equation for the plane curve defined by the parametric equations.x = 2t - 1, y = t2 + 7; -4 ? t ? 4
A. y = x2 + 1; -2 ? x ? 2
B. y = 
x2 + 
x + 
; -9 ? x ? 7
C. y = - 
x + 30; -6 ? x ? 4
D. y = 
x2 + 1; -6 ? x ? 4
Answer: B
Mathematics
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Use the variable x for the unknown. Write an equation representing the verbal sentence and solve the problem.At a garage sale, the most expensive item was marked $22.00 more than the cheapest item. The sum of the two items was $25.70. Find the cost of the least expensive item.
A. x + 22.00 = 25.70; $3.70 B. 25.70 - x = 22.00; $3.70 C. x(x + 22.00) = 25.70; $1.85 D. x + (x + 22.00) = 25.70; $1.85
Mathematics
Identify the equation as either an identity or not.(sin x + cos x)2 = 1
A. Identity B. Not an identity
Mathematics
Evaluate the expression.-
A. - 
B. ± 
C. 
D. 0
Mathematics
Write < or > between the pair of numbers to make the statement true.7 ___ 0
A. < B. >
Mathematics