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7nadin3 [17]
3 years ago
5

Mary cleans her room in a third of the time Daria takes to clean her room. Which equation represents the rate at which Mary clea

ns her room? m represents the time needed for Mary to clean her room d represents the time needed for Daria to clean her room
A md=3

B m=3d

C m=d
__
3

D d= m
___
3​
Mathematics
1 answer:
Korolek [52]3 years ago
4 0

Answer:

d

Step-by-step explanation:

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Almost done help......
Anton [14]

Answer:

<em>x = 1 + ( √ 10 )/ 2, or x = 1 - ( √ 10 )/ 2; Option A</em>

Step-by-step explanation:

See steps below;

I would prefer answering this question by completing the square, rather than applying a quadratic formula;

3x^2 - 6x - 12 = 0, ⇒ Add 12 to either side,

3x^2 - 6x = 12, ⇒ Divide either side by 3,

x^2 - 2x = 4, ⇒ Write the equation in the form x^2 + 2ax + a^2 = (x + a)^2,

x^2 - 2ax + a^2 = 4 + a^2, ⇒ Solve for a

2ax = -2x,

a = - 1, ⇒ Substitute value of a,

x^2 - 2x + 1 = 4 + 1,

( x - 1 )^2 = 5, ⇒ Solve for x,

x = √5 + 1, and x = - √5 + 1,

In other words; <em>Solution : x = 1 + ( √ 10 )/ 2, or x = 1 - ( √ 10 )/ 2; Option A</em>

4 0
4 years ago
Tina wants to decorate a rectangular picture frame measuring 18 w 14 tall she has 4 ft of rope dies she have enough rope
igor_vitrenko [27]

Tina does not have enough rope to decorate the frame

Step-by-step explanation:

Tina wants to decorate a rectangular picture frame

  • The width of the frame is 18 inches
  • The length of the frame is 14 inches
  • She has 4 feet rope

We want to know if she has enough rope or not to decorate the frame

∵ The frame is in the shape of the rectangle

- The length of the rope must be equal the perimeter of the frame

∵ The perimeter of a rectangle = 2 length + 2 width

∵ The length = 14 inches

∵ The width = 18 inches

∴ The perimeter of the frame = 2(14) + 2(18) = 28 + 36 = 64 inches

∵ The length of the rope is 4 feet

∵ 1 foot = 12 inches

∴ The length of the rope = 4 × 12 = 48 inches

∵ 48 < 64

∴ The length of the rope is less than the perimeter of the frame

∴ Tina does not have enough rope

Tina does not have enough rope to decorate the frame

Learn more:

You can learn more about word problems in brainly.com/question/12148432

#LearnwithBrainly

5 0
3 years ago
Systems of equations - substitution method <br><br> -8x+7y=10<br> Y=3x+7
andre [41]

Answer:

<h2>x= -3 , y = -2</h2>

Step-by-step explanation:

<h3> <em>Hope </em><em>it </em><em>helps </em><em>you.</em><em>.</em><em>.</em><em>.</em></h3><h2>Mark this answer as brainliest</h2>

5 0
3 years ago
PLEASE HELP ON THESE TWO QUESTIONS ILL GIVE BRAINLIEST AND EVERYTHING ELSE
kirza4 [7]

Answer:

1)   p = 208/8

2) p = 9.54/6

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the value of the 3 in the number 61.83
melamori03 [73]

Answer:

three occupies the hundredths place (it is 3/100 of a whole number)

8 0
3 years ago
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