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4 years ago

I decided since its summer I wont be needing the points no more so you can have 50 points :D

Mathematics

2 answers:

asambeis [7]4 years ago

6 0

Answer:

cool, cause its winter for me

Step-by-step explanation:

lesya [120]4 years ago

5 0

Answer:

THANK YOU SOOOO MUCH

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In a pen of goats and chickens there are 25 heads and 90 feet. How many goats and chickens are in the pen.

Anna [14]

Answer:

5 chickens, 20 goats

Step-by-step explanation:

We can set up two equations and use substitution

There are 25 total goats and chickens, so

$G + C = 25$

Goats have 4 feet and chickens have two, so

$4G + 2C = 90\\$

By solving for G in the first equation,

$G = 25 - C\\$

We can now use substitution,

$G = 25 - C\\4G + 2C = 90\\4(25 - C) + 2C = 90\\100 - 4C + 2C = 90\\-2C = -10\\C = 5\\$

We have 5 chickens, so we have 20 goats.

Let's double check:

$5(2) + 20(4) = 90\\10 + 80 = 90\\90 = 90\\$

It checks out!

3 0

4 years ago

PLEASE HELP!!!!!

Katena32 [7]

Answer:6018

Step-by-step explanation:

Given Sequence

$-282-266-250-234.....$

It represent an A.P. with

first term $a=-282$

common difference $d=16$

So sum of 51 term

$S_n=\frac{n}{2}[2a+(n-1)d]$

$S_{51}=\frac{51}{2}\times [2\times (-282)+(51-1)16]$

$S_{51}=\frac{51}{2}\times [-564+800]$

$S_{51}=\frac{51}{2}\times [236]$

$S_{51}=51\times 118$

$S_{51}=6018$

7 0

3 years ago

Five standard six-sided dice are rolled. We are told there is no three-of-a-kind, but there is a pair of dice that show the same

Neko [114]

The probability that after re-rolling these three dice, at least three of the five dice show the same value is $\frac{4}{9}$

Of the three dice rolled, one may match the original pair and two are different, and this can occur three ways:

$(\frac16 \times \frac56 \times \frac56 ) + ( \frac56 \times \frac16 \times \frac56 ) + ( \frac56 \times \frac 56 \times \frac 16 ) = \frac {75}{216}$

[ where $\frac{1}{6}$ is the probability of matching the first two and $\frac{5}{6}$ is the probability of not matching the first two ]

Or, two may match the original pair and one is different

$( \frac16 \times \frac16 \times \frac 56 ) + ( \frac16 \times \frac56 \times \frac 16 ) + ( \frac56 \times \frac16 \times \frac16 ) = \frac {15}{216}$

Or, all three may match the original pair

$( \frac 16 \times \frac 16 \times \frac 16 ) = \frac {1}{216}$

Or, all three may be the same, but not match the original pair:

$( \frac 56 \times \frac 16 \times\frac 16 ) = \frac {5}{216}$

[ where $\frac{5}{6}$ is the probability of getting a new number and $\frac{1}{6}$ is the probability of matching that new number ]

Adding these together: $\frac {75}{216} + \frac {15}{216} + \frac 1{216} + \frac 5{216} = \frac {96}{216} = \frac 49$

To learn more about probability with the given link

brainly.com/question/11234923

#SPJ4

3 0

2 years ago

How do we solve pH = -log[H^+] for 7.3

bearhunter [10]

Answer:

Toilet rolls come in packs of 4 and 9.

The 4-pack is priced at £2.04.

The 9-pack is priced at £4.68.

By calculating the price per roll, determine which pack is better value. Show your working.

7 0

3 years ago

Find slope and equation of a line that is parallel to the x axis passing through the point (-4,8)

elena-14-01-66 [18.8K]

If the line is parralell to the x axis then take the y coordinate of your point and thats the equation y=8 since its a horizontal line it has a slope of 0. just remember the acronym HOY VUX; Horizontal 0 y=; Vertical undefined x=

8 0

3 years ago