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3 years ago

ayyyyyyyy yall i need some help please i reallyyyyyyyyyy needdddddddddddd itttttttttttttttttttttttttttt

Mathematics

1 answer:

yawa3891 [41]3 years ago

3 0

Answer:

22 is the avrage rate of elavation change in feet per second if a sumbarine dives 440 feet in 20 seconds

-22 is the avrage temature change in degrees

440 is the avrage distance in miles

2.20 is the boys height if that makes sense

Step-by-step explanation:

if it dosent make sent om sorry

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each cow has 4 legs and each chicken has 2 legs. If a boy counts 42 heads and 144 feet, how many cows are there?

netineya [11]

Solution:

we are given that

Each cow has 4 legs and each chicken has 2 legs.

A boy counts 42 heads and 144 feet.

we have been asked to find how many cows are there?

Let there are x cows and y chicken.

Then we can write

$x+y=42....(i)\\ \\ \text{Sum of Heads}\\ \\ 4x+2y=144\\ \\\\\text{Sum of feet }\\ \\ \Rightarrow 2x+y=72....(ii)\\ \\ \text{Now solve these two equation together we get}\\ \\\\2x+(42-x)=72\\ \\ 2x+42-x=72\\ \\ x=72-42=30\\$

Hence Number of cows=30

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