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3 years ago

What is the gcf of 12 and 36

Mathematics

1 answer:

timofeeve [1]3 years ago

4 0

The gcf would be 12 because both 12 and 36 can be divided by 12 and it is the highest number

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Andrew

PilotLPTM [1.2K]

Let's say Bailey takes "b" days to paint it.

and Andrew takes "a" days to paint the same house.

now, Andrew is 6 times faster than Bailey, therefore, if Andrew takes "a" days to do it, Bailey takes then "6a" days, or b = 6a.

now, the year they worked together, they finished it in 7 days.

so, after 1 day then, they have only done 1/7 of the whole work.

and Andrew for one day, has done 1/a of the house, whilst Bailey has done 1/b of the house or 1/(6a).

$\bf \stackrel{\textit{Andrew's rate}}{\cfrac{1}{a}}+\stackrel{\textit{Bailey's rate}}{\cfrac{1}{b}}=\stackrel{\textit{1 day of work}}{\cfrac{1}{7}}
\\\\\\
\cfrac{1}{a}+\cfrac{1}{6a}=\cfrac{1}{7}\impliedby 
\begin{array}{llll}
\textit{let's multiply all by }\stackrel{LCD}{42a}\textit{ to toss the}\\
denominators
\end{array}$

$\bf 42a\left( \cfrac{1}{a}+\cfrac{1}{6a} \right)=42a\left( \cfrac{1}{7} \right)\implies 42+7=6a\implies \cfrac{49}{6}=a
\\\\\\
\stackrel{days}{8\frac{1}{6}}=a
\\\\\\
\textit{how many days will it take Bailey then?}\quad b=6a
\\\\\\
b=6\cdot \cfrac{49}{6}\implies b=\stackrel{days}{49}$

6 0

3 years ago

Can any math genius help me with this

vovangra [49]

Here's my working for 1) You need to find the exterior angle, then divide by 360 to find the number of sides:

Applying these steps : 

180 (Interior Angles) - 162 = 18 (Exterior angle)

360 ÷ 18 is 20 sides 

For 2)

Its the same method, so apply the steps:

180 - 175 = 5

360 ÷ 5 = 72 sides 

Hope it helps! :) 

8 0

2 years ago

In a survey of 3,300 people who owned a certain type of car, 660 said they would buy that type of car again. What percent of the

Stolb23 [73]

Answer:

20%

Step-by-step explanation:

660:3300*100 =

(660*100):3300 =

66000:3300 = 20

8 0

3 years ago

I need help fast pls

mash [69]

Answer:

1. no

2. no

3. no

4.yes

Step-by-step explanation:

1. if you solve this you will get -11/120 and you want 3/7

2. no because you will get 5/16 and you want 5/8

3. no because you will get 3/8 and you want 5/8

4. yes because you will get 5/8

6 0

2 years ago

Emma's backpack has a mass of 6523 grams. The total mass of her backpack and Benjamin's backpack together is 9009 grams. What is

Rus_ich [418]

Answer:

2486

Step-by-step explanation:

9009-6523=2486

6 0

2 years ago

Read 2 more answers