Madison has 142 stickers in her collection.what is 142 rounded to the nearest ten
2 answers:
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Answer:
Step-by-step explanation:
{5x + 2y = 23
{13x + 3y = 51
−5⁄13[13x + 3y = 51]
{5x + 2y = 23
{−5x - 1 2⁄13y = 19 8⁄13 >> New Equation
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11⁄13y = 3 5⁄13
_____ ______
11⁄13 11⁄13
[Plug this back into both equations above to get the x-coordinate of 3];
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Answer:
fourth option
Step-by-step explanation:
Using the trigonometric identity
cos²x + sin²x = 1
Divide all terms by cos²x
+
=
which gives
1 + tan²x = sec²x