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Zarrin [17]
4 years ago
6

3a+4+b+2a+5+b Simplified the expression

Mathematics
2 answers:
Masteriza [31]4 years ago
6 0

Answer:

5a + 9 + 2b

Step-by-step explanation:

(3a + 2a) + (4 + 5) +  (b + b)

5a + 9 + 2b

Shkiper50 [21]4 years ago
3 0
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Step-by-step explanation:

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Consider triangle ABC where AB=X+5, BC=X-2, area is 30cm squared. Find X by solving X^2+3X-70=0, and find the perimeter.
klasskru [66]

Answer:

What the hell AC is not given so you can't find the Perimeter

Step-by-step explanation:

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       x+10=0

  • x=7

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BC=x-2

  • BC=5

        BC=-12

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<u>Perimeter of ABC = AB+BC+</u><u>AC</u>

<u />

8 0
3 years ago
Round to the nearest tenth.
laila [671]

Answer:

8.2 units

Step-by-step explanation:

Given that the only information for our triangle are 2 sides and 1 angle, we must use the Law of Cosines to find side BC

<u />

<u>Recall the Law of Cosines</u>

<u />a^2=b^2+c^2-2bc\cdot cos(A)

<u>Identify angles and sides</u>

<u />m\angle A=23^\circ\\a=BC=?\\b=AC=14\\c=AB=6

<u>Solve for side "a"</u>

<u />a^2=b^2+c^2-2bc\cdot cos(A)\\\\a^2=14^2+6^2-2(14)(6)\cdot cos(23^\circ)\\\\a^2=196+36-168cos(23^\circ)\\\\a^2=222-168cos(23^\circ)\\\\a=\sqrt{222-168cos(23^\circ)}\\ \\a\approx8.2

Therefore, the length of line segment BC is about 8.2 units

8 0
2 years ago
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