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padilas [110]
3 years ago
8

During a drought, 3 inches of water evaporated out of a lake every hour. Which integer represents the water loss for a 7 hour pe

riod during the drought
A. -21
B. -10
C. -4
D. 21
Mathematics
1 answer:
Vesnalui [34]3 years ago
4 0
The answer is A (-21)
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Answer:

19. A

20. A

Step-by-step explanation:

19. tan(53)=15/x

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x=15/(tan53))

x=11.3 feet


20. tan(60)=12/x

x(tan(60))=12

x=12/(tan(60))

x=6.93, or 4sqrt3

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To sample the average number of pages for the books in the school library, the
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Answer:

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Step-by-step explanation:

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Toys R us is having a 38% off sale on all of their backpacks.If a backpack normally cost 22.00 how much will it be on sale
vovangra [49]

Answer:

$13.64

Step-by-step explanation:

The backpack is originally priced at $22. During the sale, the price would be 38% off which means you pay 62% of the original price. We can find this by multiplying by the percent 62 (converted into a decimal).


22(0.62)=13.64


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3 years ago
Ten students share 8 pieces of poster board equally. what fraction of a piece of poster board does each friend get?
padilas [110]
8:10= 0,8

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7 0
3 years ago
Solve for X...........
Zolol [24]

Answer:

x = 60°

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Geometry</u>

  • A box on an angle signifies a 90° angle
  • All angles in a triangle add up to 180°

Step-by-step explanation:

<u>Step 1: Set up equation</u>

x° + 90° + 30° = 180°

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

  1. Combine like terms:                    x + 120 = 180
  2. Subtract 120 on both sides:        x = 60°
6 0
2 years ago
Read 2 more answers
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