Which of the following are true statements.
the lengths 7, 40 and 41 can be sides of a right triangle. the lengths 12, 16, and 20 can be sides of a right triangle.
the lengths 7. 40 and 41 can not be sides of a right triangle. the lengths 12, 16, and 20 can be sides of a right triangle.
the lengths 7. 40 and 41 can be sides of a right triangle. the lengths 12, 16, and 20 can not be sides of a right triangle.
the lengths 7. 40 and 41 can not be sides of a right triangle. the lengths 12, 16, and 20 can not be sides of a right triangle.

y=mx+

thats not a system of equations, that is a solution

this excerpt is taken from the book “we shall not be moved : the women’s factory strike of 1909 “ and is written by joan dash. it is the story of the great strike when almost 30thousand women working in factories in america formed a union to fight unsafe working conditions, long working hours and miserable wages.

question: which best states the author’s purpose for including this information in the text?

answer: to challenge the reader’s ideas about a historical event

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.