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Gwar [14]
3 years ago
5

1/2n + 1/2n + 1/2n = 7 what is the value of n? include a check to check your answer.

Mathematics
1 answer:
Katen [24]3 years ago
4 0

Answer:

N = 8/4

Step-by-step explanation:

Multiply all terms by n and cancel:

1/2+1/2+1/2=7N

8/7=7n (Simplify both sides of the equation)

7n=8/7/7

           -

           7

(Divide both sides by 7)

n= 8/49

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Mr. Li has a bag of Skittles. There are 5 blue Skittles, 3
BigorU [14]

Answer:

1/4

Step-by-step explanation:

5/20 because you have 5 possibilities to pulling out a blue one from all in all       20

Simplified :

5/20 divided by 5

1/4

Bonus in percent

100%:4= 25%

7 0
3 years ago
Read 2 more answers
R (-3,1) and S (-1,3) are points on a circle. If RS is a diameter, find the equation of the circle.​
ELEN [110]

Answer:

\sf (x+2)^2+(y-2)^2=2

Step-by-step explanation:

If RS is the diameter of the circle, then the midpoint of RS will be the center of the circle.

\sf midpoint=\left(\dfrac{x_s-x_r}{2}+x_r,\dfrac{y_s-y_r}{2}+y_r \right)

             \sf =\left(\dfrac{-1-(-3)}{2}+(-3),\dfrac{3-1}{2}+1 \right)

             \sf =(-2, 2)

Equation of a circle:   \sf (x-h)^2+(y-k)^2=r^2

(where (h, k) is the center and r is the radius)

Substituting found center (-2, 2) into the equation of a circle:

\sf \implies (x-(-2))^2+(y-2)^2=r^2

\sf \implies (x+2)^2+(y-2)^2=r^2

To find \sf r^2, simply substitute one of the points into the equation and solve:

\sf \implies (-3+2)^2+(1-2)^2=r^2

\sf \implies 1+1=r^2

\sf \implies r^2=2

Therefore, the equation of the circle is:

\sf (x+2)^2+(y-2)^2=2

4 0
3 years ago
A skateboarder went a kilometer in 3 minutes with the wind, and returned in four minutes against the wind.
inn [45]

Step-by-step answer:

Answer to problems of this kind is the reciprocal of the harmonic mean of the time required.

We need to find the average of the speeds, not the average of the time.

The respective speeds are 1/3 and 1/4.

The average of the speeds is therefore (1/3+1/4)/2 = 7/24  (harmonic mean of the time taken).

The time required is therefore the reciprocal of the unit speed,

T = 1/(7/24) = 24/7 = 3 3/7 minutes, or approximately 3.43 minutes.

8 0
3 years ago
Graph the equation<br> y=-2x+1
Fofino [41]

Start by plotting the y-intercept at (0,1).

From that point, count "up 2, right 1" to get a second point on your graph.  

If needed repeat that "up 2, right 1" from that second point to get a third point.

Draw the line that connects these 2 or 3 points.

6 0
3 years ago
Bab needs help with Algebra two homework. show work please! Also I'll give brainliest!
Alekssandra [29.7K]

Answer:

1.  The y values are decreasing by 16  7 and 4 then rising by 7 and 16 so the line of symmetry is at -4 or 4

2. f = g(x) function just like g = f(x) function so say f value table or g(x) function

3.  y = g(x) = -4  when x = 0

4.  y - 0 = - 4x   means the same as y = -4x

5.  [0 , -4] is the vertex

6.  6(5) = 30

next page

7 the y values are increasing by 3/4 , 11/5, 1,  7/1 and  8.5 / 1

which means thy are increasing minimum by 1/1.5 and could be a square function.

8. This is a g function or  a f(x).

9. y intercept is 1

10  common ratio is  0:1

11 equation for the table is  y = x -1

12.  5.400

next page

13.

The values for y are decreasing by 2 then drop by 12 from -2/14 to 0/-2 then increase again at a rate of 20 and decrease slightly to 18 being  -2/-20

we can see this as -2/16 ,-2/14 , 0/-2  2/ -22 meaning the line of symmetry is not clear as we cannot see an average without working out the mean or adding all the totals up.

14.  p(x) function or q value.

15.  the y intercept is -2

16. the equation for this table is y = x-2

17.

The value for p(4) is same method divide smaller into larger then times x 4

-20/-2 = 10  

then -11 x 10 = -110

18. slope = -2

17) if they were asking for value for 4(p) is  16/ -2 = 8 and  -2 / 4  = 0.5/ 8 this shows 8 so 4 is half this value = 0.24 / 4  meaning x = 0.24

Step-by-step explanation:

3 0
3 years ago
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