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svetoff [14.1K]
3 years ago
15

9×3 n =3 powered by 7 slove n​

Mathematics
1 answer:
aleksandrvk [35]3 years ago
5 0

Answer:

81

Step-by-step explanation:

9 × 3n= 3^7

9×3n= 2187

27n= 2187

n= 2187/27

= 81

Hence n= 81

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It takes Ty 4 hours 30 minutes to read his favorite book, reading at a constant rate of 100 pages
AysviL [449]

Answer:

540 pages

Step-by-step explanation:

100 pages = 50 mins

??? pages = 270 mins (converted 4hrs 30 mins to minutes)

Now you could cross multiply to find what the number of pages are:

100 pages x 270  mins = 50 mins x ??? pages

27000 = 50 mins x ??? pages

27000/50 = ??? pages

540 = ??? pages

So there are 540 pages in his favourite book.

8 0
3 years ago
Help with these 3 please
kvasek [131]

If we are trying to solve this then the variable A would be equivalent to 2/5 or A < 2/5

7 0
3 years ago
A tree is 8 feet tall and grows 8 inches each year. In how many years will the tree reach a height of 30 feet?
alexgriva [62]

Answer:

3.75 im really sorry if this is wrong

Step-by-step explanation:

3 0
4 years ago
Write an equation of the perpendicular bisector of the segment with the endpoints (-8,-1) and (4,5)
stiv31 [10]

9514 1404 393

Answer:

  2x +y = -2

Step-by-step explanation:

The bisector must have a slope that is the negative reciprocal of the slope of the line between these points. It must pass through the midpoint of the segment.

The slope of the line through the given points is ...

  m = (y2 -y1)/(x2 -x1)

  = (5 -(-1))/(4 -(-8)) = 6/12 = 1/2

The slope of the required bisector is then ...

  m = -1/(1/2) = -2

__

The midpoint of the given segment is ...

  ((-8, -1) +(4, 5))/2 = (-8+4, -1+5)/2 = (-4, 4)/2 = (-2, 2)

__

Then the point-slope form of the equation of the bisector is ...

  y -y1 = m(x -x1)

  y -2 = -2(x -(-2))

  y = -2x -4 +2

  y = -2x -2 . . . . . . . slope-intercept form equation

  2x +y = -2 . . . . . . . standard form equation

6 0
3 years ago
A recipe for 8 pancakes needs the following:
Murljashka [212]

Answer:

2.25 cups

Step-by-step explanation:

There are 5 eights in 40.

1.25 × 5 = 6.25

1.5 × 5 = 7.5

1 × 5 = 5

1 quart = 4 cups

6.25 cups - 4 cups = 2.25 cups

8 0
4 years ago
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