Tuesday

January 27, 2015

January 27, 2015

Posted by **Nikki** on Wednesday, November 10, 2010 at 11:05pm.

"The zipper and the safety pin were invented in the 14th century. The safety pin was invented 44 years before the zipper. The sum of the years in which they were invented is 3742. In what year was the zipper invented?"

- Math -
**Jen**, Thursday, November 11, 2010 at 10:17amx+y=3742

x=y-44

y-44+y=3742

2y-44=3742

2y=3786

y=1893

Now plug that back into either of the first two equations to solve for x.

**Answer this Question**

**Related Questions**

History - So, this isn't a homework assignment, but I really would like to know ...

PLEASE HELP ME MATH - someone please help i hav posted my questions like 5 times...

Math - Pretty Please help me undderstand ratios and rates. I have been to a ...

PLEASE VIEW- URGENT! - I do not understand this question. Could you please ...

math ergent please please... - 10.a)Solve the inequality x^3-5x^2+2x+8<0 by i...

speech - Can you please help me out with a speech? I'm in 10th grade at High ...

Math - Multiply 1. (1.2z)(-4+2y) 2. (-2e - 3f +4)(-e) 3. (7v)(-7v-7x) 4. (-4x...

algebra - can someone help me with this question it is very hard the question is...

Clarify (URGENT) - Write a paragraph explaining what generalizations you can ...

social PSY - I need some help with this assignment. I really dont understand ...