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IrinaVladis [17]
3 years ago
11

The difference of -9 and -6?

Mathematics
2 answers:
aev [14]3 years ago
6 0

Answer:

15

Step-by-step explanation:

-9+9=0+6

9+6=15

That is the answer i think so

Drupady [299]3 years ago
6 0
The answer is 15. Because 9+6=15
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The sides of a rhombus with angle of 60° are 6 inches. Find the area of the rhombus.
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1. Check the drawing of the rhombus ABCD in the picture attached.

2. m(CDA)=60°, and AC and BD be the diagonals and let their intersection point be O.

3. The diagonals:
     i) bisect the angles so m(ODC)=60°/2=30°

     ii) are perpendicular to each other, so m(DOC)=90°

4. In a right triangle, the length of the side opposite to the 30° angle is half of the hypothenuse, so OC=3 in.

5. By the pythagorean theorem, DO= \sqrt{ DC^{2}- OC^{2} }=  \sqrt{ 6^{2}- 3^{2} }=\sqrt{ 36- 9 }=\sqrt{ 27 }= \sqrt{9*3}= 
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6. The 4 triangles formed by the diagonal are congruent, so the area of the rhombus ABCD = 4 Area (triangle DOC)=4*\frac{DO*OC}{2}=4 \frac{3 \sqrt{3} *3}{2}==2*9 \sqrt{3}=18 \sqrt{3} (in^{2})

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3 years ago
What is and integer greater than -12 and less than -2
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Step-by-step explanation:

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