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Nadusha1986 [10]
3 years ago
11

SOMEONE PLEASE HELP!!! WORTH 30PTS!!

Mathematics
2 answers:
MAXImum [283]3 years ago
7 0
Tiles: 10%
Dog food: 15%
Distance: 20%
Bug Measurement: 12.5%
Rashid [163]3 years ago
3 0
<h2>Answer:</h2>

Here we will check the percent changes in the values.

1. Candice buys a board that is 12 feet long. The store incorrectly measures and prices the board at 13.2 feet.

% change = \frac{13.2-12}{12} \times100=10%

2. Leo weighs 10 pounds of dog food at the pet store. The scale mistakenly lists the bag at 11.5 pounds.

% change = \frac{11.5-10}{10} \times100=15%

3. Josie’s odometer says she traveled 24 miles in her car. Her GPS, the more accurate source, says the distance is actually 20 miles.

% change = \frac{24-20}{20} \times100=20%

4. Lenny’s bug collection has a bug that is 16 centimeters long. Lenny fumbles with a ruler and incorrectly reports the bug to be 18 centimeters long.

% change = \frac{18-16}{16} \times100=12.5%

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Ava has 2 dozen pencils. 3/8 of them are sharpened. how many of them are sharpened?
zzz [600]

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4 0
3 years ago
Solve the inequality:<br> 16 &lt; -2(x + 4)
Colt1911 [192]

Answer:

x < -12

General Formulas and Concepts:

<u>Pre-Algebra</u>

Distributive Property

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality

Step-by-step explanation:

<u>Step 1: Define</u>

16 < -2(x + 4)

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute -2:                          16 < -2x - 8
  2. Add 8 to both sides:             24 < -2x
  3. Divide -2 on both sides:       -12 > x
  4. Rewrite:                                 x < -12

Here we see that any number <em>x</em> smaller than -12 would work as a solution to the inequality.

7 0
3 years ago
The cat is 12 feet above the ground and the ladder is 9 feet away from the tree because of the mud. How long does the ladder nee
marin [14]

Answer:

15 feet

Step-by-step explanation:

The ladder is the hypotenuse of a right triangle, with the legs being 9 ft and 12 ft long (see the picture).

To solve for the length of the ladder, use the Pythagorean Theorem.

9^{2} +12^{2} =c^{2} \\c=\sqrt{9^{2} +12^{2}} \\c=\sqrt{81+144} \\c=\sqrt{225} \\c=15

4 0
3 years ago
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