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erik [133]
3 years ago
12

Sadie needed to get her computer fixed. She took it to the repair store. The technician

Mathematics
1 answer:
OLga [1]3 years ago
4 0

Answer:

302-77=x*5

x=45

Step-by-step explanation:

302-77=x*5

225=x*5

divide both sides by 5

45=x

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456.05 which digit is in the tenths place
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It's the zero in the tenth place
   
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Need help on number one and three
Naya [18.7K]

An example for #1 would be that: 15 is divisible by 3, but not 9. every third multiple of 3, (9, 18, 27,...) is divisible by 9 because 9 is three times the size of 3.

For part two the first number that I thought of is 23.

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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.

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3 years ago
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BlackZzzverrR [31]
The answer is (-10/3)
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y=-5x - 1

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