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amm1812
2 years ago
12

Lisa uses her hair dryer daily dryer uses 1500 watts. it take 10 mintes to dry her hair each time she uses it. how much would it

cost to run her hair dryer for the week, at a cost of $.20 per kilowatt- hour?
Mathematics
1 answer:
Volgvan2 years ago
3 0

Answer:

Step-by-step explanation:

The answer is $11.55 for the week.

1) Since 1 watt is 0.001 kilowatts, 1500 watts is 1.5 kilowatts.

2) Multiply that by 7 for the week and that equals 10.5.

3) It takes her 10 minutes each day, so it takes 70 minutes per week, that is also 1.1 hours.

4) Multiply 10.5 kilowatts by 1.1 hours and you get 11.55.

5) The answer is $11.55 per week to dry Lisa's hair.

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5 0
3 years ago
A necklace has and matching bracelet have two types of beads. The necklace has 12 large beads and 8 small beads and weighs 88 gr
miv72 [106K]

Weight of one large bead is 1.5 grams and weight of one small bead is 8.75 grams.

Step-by-step explanation:

Let,

Weight of one large bead = x

Weight of one small bead = y

According to given statement;

12x+8y=88     Eqn 1

5x+2y=25      Eqn 2

Multiplying Eqn 2 by 4

4(5x+2y=25)\\20x+8y=100\ \ \ Eqn\ 3\\

Subtracting Eqn 1 from Eqn 3

(20x+8y)-(12x+8y)=100-88\\20x+8y-12x-8y=12\\8x=12

Dividing both sides by 8

\frac{8x}{8}=\frac{12}{8}\\x=1.5

Putting x=1.5 in Eqn 1

12(1.5)+8y=88\\18+8y=88\\8y=88-18\\8y=70

Dividing both sides by 8

\frac{8y}{8}=\frac{70}{8}\\y=8.75

Weight of one large bead is 1.5 grams and weight of one small bead is 8.75 grams.

Keywords: linear equation, elimination method

Learn more about elimination method at:

  • brainly.com/question/11334714
  • brainly.com/question/11345547

#LearnwithBrainly

5 0
2 years ago
Liz earns a salary of $2,100 per month, plus a commission of 5% of her sales. She wants to earn at least $2,400 this month. How
Nookie1986 [14]
Hello! She earns a salary of $2,100, which is the fixed amount each month, plus 5% commission on her sales. To find out the amount of sales that will help her reach her goal, set up the inequality like this:

2,100 + 0.05x ≥ 2,400

We set it up like this, because $2,100 is the one-time price per month, and she earns 5% of her sales as commission. Plus, the key words "at least" means the inequality sign is greater than or equal to (≥)

How to solve this:

First off, subtract 2,100 from both sides, when you do, you get 0.05x ≥ 300. Now, divide each side by 0.05 to isolate the "x". 300/0.05 is 6,000. Let's check this. 6,000 * 5% (0.05) is 300. There. x = 6,000. Liz will need to sell $6,000 worth of items this month in order to meet her goal.
7 0
3 years ago
The table shows locations on a map.
Nina [5.8K]

Answer:

The table shows locations on a map.

<u>Place</u>

  1. park
  2. farmers market
  3. post office
  4. bus stop

<u>Location</u>

  1. (-2,2)
  2. (-2,3)
  3. (2, 2)
  4. (6,-3)

Which places on the map are 4 units apart?

O the park and the farmer's market

O the farmers market and the bus stop

<em><u>✓</u></em> <em><u>the post office and the park</u></em>

O the post office and the bus stop

Step-by-step explanation:

Distance :---

→ \sqrt{ {(2 - ( -2 ))}^{2}  + {(2 - 2)}^{2}  } \\   = \sqrt{ {4}^{2} +  {0}^{2}  }  =  \sqrt{ {4}^{2} }  =  \boxed{4 \: units}

5 0
3 years ago
Simplify a^n*a^-n<br><br> Thank you! :)
irakobra [83]
Yy^2 I'm pretty sure is the answer! 
6 0
3 years ago
Read 2 more answers
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