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Nezavi [6.7K]
2 years ago
14

Solve and show how you did: -2x + (12 - 9) = 2 + 9 + 2x

Mathematics
1 answer:
Norma-Jean [14]2 years ago
5 0
Remove parentheses
-2x + 12 - 9 = 2 + 9 + 2x

Simplify -2x + 12 -9 to -2x + 3
-2x + 3 = 2 + 9 + 2x

Simplify 2 + 9 + 2x to 2x + 11
-2x + 3 = 2x + 11

Add 2x to both sides
3 = 2x + 11 + 2x

Simplify 2x + 11 +2x to 4x + 11
3 = 4x + 11

Subtract 11 from both sides
3 - 11 = 4x

Simplify 3 - 11 to - 8
-8 = 4x

Divide both sides by 4
-8/4 = x

Simplify 8/4 to 2
-2 = x

Switch sides
x = -2
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In the figure, AB∥CD. Find x and y.
velikii [3]

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y=131°

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Step-by-step explanation:

∠ ABD and ∠ BDC are supplementary.

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x and 37° are complementary, that  is, they add up to 90°

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8 0
3 years ago
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In triangle ABC, AB = 11 cm, BC = 9 cm and CA = 10 cm.<br> Find the area of triangle ABC.
max2010maxim [7]

Answer:

Area = 42.43 square cm

Step-by-step explanation:

Using Heron's Formula :

 Area = \sqrt{s\times (s-a) \times (s-b) \times(s -c)} \ , \ where  \ s \ =\ \frac{a+ b+ c}{2}

<em><u>Find Area :</u></em>

<em><u></u></em>

s = \frac{11 + 9 + 10 }{2} = \frac{30}{2} = 15

Area = \sqrt{15 \times ( 15 - 11 ) \times { (15 - 9 ) \times ( 15 -10)}\\\\

      = \sqrt{15 \times 4 \times 6 \times 5}\\\\=\sqrt{1800}

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2 years ago
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tankabanditka [31]

Answer:

the total price of the CD including tax is $11.984

Step-by-step explanation:

The computation of the total price of the CD including tax is shown below:

The Selling price of the CD is $14

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And, the sales tax rate is 7%

So, the total price of the CD is

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= $11.2 × 1.07

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Hence, the total price of the CD including tax is $11.984

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2 years ago
What are the multiples of 1/7?
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Answer:

the correct answer is d

6 0
2 years ago
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