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Elenna [48]
3 years ago
13

PLEASE ANSWERRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR

Mathematics
1 answer:
Lemur [1.5K]3 years ago
4 0

Answer:

2 miles per practice

Step-by-step explanation:

Slope= change in y/change in x

= (50-30)/(10-0)

= 20/10

= 2

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3 years ago
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Let y=(3x + f(4 − x^2))^3. Find dy/dx for x=1, given that f(3)= -6 and f'(3)= 4
Shkiper50 [21]

Answer:

correct

Step-by-step explanation:

4 0
3 years ago
The length of a rectangle is nine inches more than its width. Its area is 486 square inches. Find the width and length of the re
Elan Coil [88]

Answer:

  • width: 18 in
  • length: 27 in

Step-by-step explanation:

The relations between length (L) and width (W) are ...

  W +9 = L

  LW = 486

Substituting gives ...

  (W+9)W = 486

  W^2 +9W -486 = 0 . . . put in standard form

  (W +27)(W -18) = 0 . . . . factor

  W = 18 . . . .  the positive solution

The width of the rectangle is 18 inches; the length is 27 inches.

_____

<em>Comment on factoring</em>

There are a number of ways to solve quadratics. Apart from using a graphing calculator, one of the easiest is factoring. Here, we're looking for factors of -486 that have a sum of 9.

486 = 2 × 3^5, so we might guess that the factors of interest are -2·3² = -18 and 3·3² = 27. These turn out to be correct: -18 +27 = 9; (-18)(27) = -486.

3 0
3 years ago
While shopping , lucinda
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She originally had $320 in her savings. 48 times 100= 4,800. 4,800 divided by 15=320.
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