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olga55 [171]
3 years ago
7

Ella sold 37 necklaces for $20 each at the craft fair. She is going to donate half of the money she earned to charity. Use the C

ommutative Property to mentally find how much money she will donate. Explain the steps you used.
Mathematics
2 answers:
lozanna [386]3 years ago
5 0

Ella sold 37 necklaces for $20 each at the craft fair. She is going to donate half of the money she earned to charity. Use the Commutative Property to mentally find how much money she will donate. Explain the steps you used.

Solution:

Earning from 1 necklace=$20

Earning from 37 necklaces=$20*37

Half of the earnings= \frac{20*37}{2} =\frac{20}{2}*37=10*37

Half of the earnings=$10*37

Now, Applying Commutative Propert, a*b=b*a

So, Money she need to donate= Half of the earnings= 10*37 =37*10

So, Money she donates=$370

money she will donate=$370

atroni [7]3 years ago
3 0
370 because 740 halved is 370

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Please help!!!
navik [9.2K]

The right answer is: x + x + 2 + 9 = 29

Step-by-step explanation:

According to given statement,

Side 1: 9 units

Side 2: x units

Side 3: x+2 units

The perimeter of a triangle is given by

Side1+Side2+Side3=P\\

Putting the values we get

(9) + (x) + (x+2) = 29\\9+x+x+2=29\\x+x+2+9=29

Hence,

The right answer is: x + x + 2 + 9 = 29

Keywords: Perimeter, triangle

Learn more about perimeter at:

  • brainly.com/question/9369548
  • brainly.com/question/9328925

#LearnwithBrainly

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3 years ago
What equation is equivalent to x2 + 20x + 81 = -27? Can you show me how you got the answer please
Alla [95]

The equivalent equation is x² + 20x = -102

<h3>Simplification of quadratic equation</h3>

The equivalent equation can be obtained by factorizing or simplifying the given quadratic equation as shown below;

x² + 20x + 81 = -21

<em>collect similar terms together</em>

x² + 20x + 81 + 21 = 0

x² + 20x + 102 = 0

The equation can also be written as x² + 20x = -102

Thus, the equivalent equation is x² + 20x = -102

Learn more about simplification of quadratic equation here: brainly.com/question/1214333

4 0
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Ivan

Answer:

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Step-by-step explanation:

combine terms

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