LexiaaLykath LexiaaLykath

20-02-2017
Mathematics

contestada

How many pounds of nails costing $7 per pound must be mixed with 6 pounds of nails costing $3 per pound to yield a mixture costing $4 per pound?

Respuesta :

sheheryar91 sheheryar91

20-02-2017

let nails 7/pound=N1
nails 3/pound=N2

let N1=x
N2=6
then total=x+6
7x+6*3=(x+6)*4
7x+18=4x+24
3x=6
x=2
so 2 pounds on Nails costing 7/pound must be added

Answer Link

Otras preguntas

Could somebody help with number 14 please.

What were some of the unique aspects of the Mayan life?

Who are the speakers in "The Death of the Hired Man"?

Marine vascular plants include?

Which type of graphic organizer would best organize your notes on how to start a small business? A). a timeline B). a Venn diagram C). problem-solution chart D

During Tyler's 7th grade year, he read 25 books. In his 8th grade year, he read 30 books. Find the percent of change.

plzzzzzz hellppppp it is for mathh

ADVICE WOULD BE NICE Hey y'all! My cousin is always asking me uncomfortable and s3xu4l questions. I try to avoid her but please tell me what I should do! I'm go

What are two literary devices authors can use in short stories?

whats the answer? its for india btw