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sleet_krkn [62]
2 years ago
14

Plz solve this pic fast and correctly!!!

Mathematics
1 answer:
Leni [432]2 years ago
6 0

Answer:

mi = 45(hr)

  hr = mi/45

Step-by-step explanation:

Distance = 45 mph times the number of hours (time)   D = 45t  

time in hours = the number of miles (Distance) divided by 45 mph  t = D/45

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X2y, for x = 3 and y = 6
DENIUS [597]

Answer:

12

Step-by-step explanation:

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Slope of 0 3 and 4 1
attashe74 [19]

Answer:

m = \frac{-1}{2}

Step-by-step explanation:

The slope of (0,3) (4,1) =

\frac{-1}{2}

Hope this helps :)

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What's the circumference of a circle with a diameter of 9 inches?​
yaroslaw [1]

Answer:

9pi

Step-by-step explanation:

circumference= 2 (pi) (r)

radius = diameter \ 2

r = 9 \ 2 = 4.5in.

c = 2 (pi) (4.5)

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Hope this helps!

3 0
3 years ago
Help Its due in 3 mins I will give brainliest
I am Lyosha [343]

Answer:

144 yd^2

Step-by-step explanation:

(9x12)+(6x6)

4 0
2 years ago
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A rectangle is twice as long as it is wide and has the same perimeter as a square whose area is 36 square feet larger than that
Korvikt [17]

Answer:

  • rectangle: 12 ft × 24 ft
  • square: 18 ft square

Step-by-step explanation:

You want the dimensions of a rectangle and square such that they have the same perimeter, but the square has an area of 36 more square feet. The rectangle is twice as long as wide.

<h3>Setup</h3>

Let x represent the side length of the square. Then its area is x², and the area of the rectangle is (x² -36).

This area is the product of length and width. The expression factors as ...

  rectangle area = x² -36 = (x +6)(x -6)

<h3>Solution</h3>

If we assume these factors are the dimensions of the rectangle, then the longer dimension is twice the shorter one:

  (x +6) = 2(x -6)

  18 = x . . . . . . . . . add 12-x to both sides

This is the side length of the square. The rectangle dimensions are ...

  x+6 = 18+6 = 24 . . . . feet long

  x -6 = 18 -6 = 12 . . . . feet wide

The rectangle is 12 feet wide and 24 feet long. The square is 18 feet on a side.

__

<em>Additional comment</em>

The perimeter in each case is 4x = 2((x+6) +(x -6)) = 72 ft.

The area of the rectangle is (12 ft)(24 ft) = 288 ft². The area of the square is (18 ft)² = 324 ft², a value that is 36 ft² more than the rectangle area.

<em>Alternate solution</em>

Using x for the width of the rectangle, the length is 2x and its area is x(2x) = 2x². The perimeter is 2(x +2x) = 6x, so the side length of the square is (6x)/4 = 3/2x and its area is (3/2x)² = 9/4x².

The difference is 36 square feet, so we have ...

  9/4x² -2x² = 36 = x²/4   ⇒   x = √(36·4) = 6·2 = 12 . . . . width of rectangle

8 0
1 year ago
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