Write the number in expanded form.581
A. 5(1000)+ 8(100) + 1(10)
B. 5(10) + 8(100) + 1(1000)
C. 5(1) + 8(10) + 1(100)
D. 5(100) + 8(10) + 1(1)
Answer: D
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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 60° larger than each of A and B. What are the measures of the three angles?
A. A and B: 100°; C: 40° B. A and B: 50°; C: 80° C. A and C: 80°; B: 50° D. A and B: 40°; C: 100°
Find the center and radius of the sphere whose equation is 
. Round your answer to two decimal places, where applicable.
?
A. center: 
; radius: 2.00
B. center: 
; radius: 2.00
C. center: 
; radius: 8.00
D. center: 
; radius: 4.00
E. center: 
; radius: 8.00
Solve for the variable.
y + 
= - 
y - 
A. y = 
B. y = - 
C. y = - 
D. y = 
Graph the equation.
+ y2 = 1
A. 
B. 
C. 
D. 