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, ...}

{

...,

...}

{

10,

15,

20,

...,

...}

{

...,

...}

{

10,

15,

20,

...,

5n,

...}

{

...,

...}

{

10,

15,

20,

...,

5n,

...}

{

...,

...}

{

10,

15,

20,

...,

6n,

...}

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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 ? = -