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pogonyaev
3 years ago
14

What is 3/4 - 9/12. plz help

Mathematics
2 answers:
vova2212 [387]3 years ago
8 0
3 divided by 4 subtract 9 divided by 12 equals 0. Hope this helps
Rzqust [24]3 years ago
5 0
Your answer will be 0 :)
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What is the slope of a line perpendicular to the line whose equation is 3x+6y=-183x+6y=−18. Fully reduce your answer.
schepotkina [342]

Answer:

2

Step-by-step explanation:

The given equation of line is

3x+6y=-18

We need to find the slope of a line which is perpendicular to the given line.

The given equation can be rewritten as

3x+6y+18=0      ...(i)

If a line is defined as ax+bx+c=0, then the slope of the line is  

m=-\dfrac{a}{b}

In equation (i), a=3, b=6 and c=18. So, slope of the line is

m_1=-\dfrac{3}{6}=-\dfrac{1}{2}

Let m_2 be the slope of perpendicular line.

We know that product of two perpendicular line is -1.

m_1\cdot m_2=-1

(-\dfrac{1}{2})\cdot m_2=-1

Multiply both sides by -2.

m_2=2

Therefore, the slope of perpendicular line is 2.

6 0
3 years ago
This is the question.<br><br><br><br> solve (3.4)x(0.2)
Umnica [9.8K]

Answer:

0.68

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
11. The perimeter of a rectangular garden is 96 ft. The length is five times the width. Find
asambeis [7]

Answer:

Length =40 ft.

width. = 8 ft.

Step-by-step explanation:

If The length is five times the width , then

width = w

length = 5w

Perimeter of Rectangle = 2( l+b)

2(5w+w)= 96

2( 6w) = 96

12 w= 96

w = 96/12

w= 8ft.

length = 5(8)

= 40 ft

5 0
3 years ago
In a population distribution, a score of x=57 corresponds to z=-0.25 and a score of x=87 corresponds to z=1.25. Find the mean an
Serggg [28]

Here is dependence between scores and x-values:

Z_i=\dfrac{X_i-\mu}{\sigma},

where \mu is the mean, \sigma is standard deviation and i changes from 1 to 2.

1. When i=1, Z_1=-0.25,\ X_1=57, then

-0.25=\dfrac{57-\mu}{\sigma}.

2. When i=2, Z_2=1.25,\ X_2=87, then

1.25=\dfrac{87-\mu}{\sigma}.

Now solve the system of equations:

\left\{\begin{array}{l}-0.25=\dfrac{57-\mu}{\sigma}\\ \\1.25=\dfrac{87-\mu}{\sigma}.\end{array}\right.

\left\{\begin{array}{l}-0.25\sigma=57-\mu\\ \\1.25\sigma=87-\mu.\end{array}\right.

Subtract first equation from the second:

1.25\sigma-(-0.25\sigma)=87-57,\\ \\1.5\sigma=30,\\ \\\sigma=20.

Then

1.25=\dfrac{87-\mu}{20},\\ \\87-\mu=25,\\ \\\mu=87-25=62.

Answer: the mean is 62, the standard deviation is 20.

3 0
3 years ago
Read 2 more answers
A very surveyed 240 people about their favorite type of movie if 15% of the people chose documentaries how many of the people ch
taurus [48]

Step-by-step explanation:

If the library surveyed 240 people and only 15% chose documentaries, then only 36 people chose documentaries and the other 204 chose something else other than documentaries. You had to get 15% into decimal form and to do that you move the "." in 15.0% left 2 places so you get 0.15. Then you multiply 240 by 0.15 and you get 36. 



5 0
3 years ago
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