3 years ago

Hey guys! which one is it (photo below)

Mathematics

1 answer:

AlekseyPX3 years ago

7 0

The answer to your question is c

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Given: AACD is isosceles with angle D as the vertex angle. B is the midpoint of AC. AB= x + 5, BC= 2x - 3, and CD = 2x + 6. Find

Marina86 [1]

Answer:

70 units

Step-by-step explanation:

Given triangle ACD

AB = BC
CD = 2x + 6
AB = x + 5
BC = 2x - 3
P = ?

Perimeter is sum of the side lengths:

P = AD + CD + AC

AD = CD because D is vertex and the triangle is isosceles

AC = AB + BC because B is midpoint of AC

Then P is:

P = 2(2x + 6) + (x + 5) + (2x -3) = 4x + 12 + x + 5 + 2x - 3 = 7x + 14

Find the value of x from the AB = BC:

x + 5 = 2x - 3
2x - x = 5 + 3
x = 8

Then find the value of P:

P = 7*8 + 14 = 56 + 14 = 70 units

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3 years ago

2a+6+1....................................

alexgriva [62]

Answer:

2a +7

Step-by-step explanation:

6 0

3 years ago

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myrzilka [38]

Answer:

Step-by-step explanation:

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3 years ago

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*EXTRA PTS* pls answer all 3 :)

dezoksy [38]

Answer:

5, x = 0, y = -2

6, x = 4, Y = 9

7, X = -2, Y = -2

Step-by-step explanation:

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3 years ago

PLEASE HELP ME PLEASE PLEASE PLEASE!!! IMA FAIL THIS TEST HELP

notka56 [123]

The equation is y=2x+10

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3 years ago

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