Factor the perfect square trinomial completely.x2 + 14xy + 49y2

A. (x - 7y)2
B. (x + 7y)(x - 7y)
C. prime
D. (x + 7y)2


Answer: D

Mathematics

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Show that the set has cardinal number ?0 by establishing a one-to-one correspondence between the set of counting numbers and the given set. Be sure to show the pairing of the general terms in the sets.{5, 10, 15, 20, ...}

A.

{1,2,3,4,...,n,...}
{5,10,15,20,...,n,...}

B.
{1,2,3,4,...,n,...}
{5,10,15,20,...,5n,...}

C.
{0,1,2,3,...,n,...}
{5,10,15,20,...,5n,...}

D.
{1,2,3,4,...,n,...}
{5,10,15,20,...,6n,...}

Mathematics

Find the exact values of the remaining trigonometric functions of ? from the given information.cos ? = , sin ? < 0

A. sin ? = - 
cos ? = 
tan ? 
= - 
csc ? = - 
sec ? = 
cot ? = - 
B. sin ? = - 
cos ? = 
tan ? 
= - 
csc ? = - 
sec ? = 
cot ? = - 
C. sin ? = - 
cos ? = 
tan ? 
= - 
csc ? = - 
sec ? = 
cot ? = - 
D. sin ? = 
cos ? = 
tan ? 
= - 
csc ? = 
sec ? = - 
cot ? = - 

Mathematics

Use a calculator to find a graphical solution to the equation. Express results to the nearest thousandth.4x2 + 8x = - 1

A. -3.134, -4.866 B. -0.134, -1.866 C. -0.033, -0.467 D. 0.118, -2.118

Mathematics

Convert the angle to decimal degrees and round to the nearest hundredth of a degree.251°44'20"

A. 251.70° B. 251.75° C. 251.74° D. 251.80°

Mathematics