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3 years ago

Add 2 1/4 hours to 6 hours 20 minutes please show the work

2 answers:

8 0

2 1/4 hours = 2 hours and 15 minutes
1/4 hours= 15 minutes because 15 goes into 60 four times
2 hours and 15 minutes + 6 hours and 20 minutes
2+6=8 hours
15+20=35 minutes
8 hours and 35 minutes is your final answer

Scrat [10]3 years ago

3 0

Answer:

Step-by-step explanation:

$1h=60min\to\dfrac{1}{4}h=\dfrac{1}{4}(60min)=15min\\\\2\dfrac{1}{4}h=2h\ 15min\\\\2\dfrac{1}{4}h+6h\ 20min=2h\ 15min+6h\ 20min=(2+6)h+(15+20)min=8h\ 35min$

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If a = 0.6 repeating and b = 0.75, then a x b = blank and a/b = blank

atroni [7]

Answer:

a*b = 1/2

a/ b = 8/9

Step-by-step explanation:

a = 0.66666 and b = 0.75

To multiply it we write the decimal numbers in fraction form

a= 0.666666...

Multiply by 10 on both sides

10 a = 6.66666...

a = 0.66666...

Subtract the second equation

9a = 6

divide by 9 on both sides

$a=\frac{6}{9}=\frac{2}{3}$

so 0.6666 = 2/3

Now we convert 0.75 into fraction form

$0.75=\frac{0.75}{1}$

Multiply top and bottom by 100 to remove decimal

$\frac{75}{100} = \frac{3}{4}$

so 0.75 is 3/4

a= 2/3 and b = 3/4

$a*b = \frac{2}{3} * \frac{3}{4} = \frac{6}{12} = \frac{1}{2}$

$\frac{a}{b} = \frac{\frac{2}{3}}{\frac{3}{4}} = \frac{2}{3} * \frac{4}{3} =\frac{8}{9}$

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3 years ago

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tankabanditka [31]

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2 years ago

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Find the equation of the line passing through the point (4,−1) that is parallel to the line 2x−3y=9 Find the slope of the line 2

AnnZ [28]

Answer:

Step-by-step explanation:

2x - 3y = 9

-3y = -2x + 9

$y=\frac{-2}{-3}x + \frac{9}{-3}\\\\y=\frac{2}{3}x-3\\$

Parallel lines have same slope.So,

Slope m = 2/3

(4 , -1)

Equation: y - y1 = m(x - x1)

$y-[-1]=\frac{2}{3}(x - 4)\\\\y+1=\frac{2}{3}*x - \frac{2}{3}*4\\\\y+1=\frac{2}{3}x-\frac{8}{3}\\\\y=\frac{2}{3}x-\frac{8}{3}-1\\\\y=\frac{2}{3}x-\frac{8}{3}-\frac{3}{3}\\\\y=\frac{2}{3}x-\frac{11}{3}$