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Alexandra [31]
3 years ago
8

AYUDA IM NOT GOOD WITH MATH aka mathematics we here

Mathematics
2 answers:
svp [43]3 years ago
8 0

Answer: 15

(if i'm not being a idiot)

5x=4x+3

1x = 3

3 x 5

AB=15

Sergio [31]3 years ago
7 0

Answer:

Hola!

Step-by-step explanation:

In ∆ DBA and ∆ DCB,

DB =DB......(Common side)

AD=DC........(Given)

Angle DBC = Angle DBA.....(90° formed by the perpendicular on AC)

Hence,

∆ DBA and ∆ DCB, are congruent by SAS Criterion,

.°. <em><u>AB </u></em><em><u>=</u></em><em><u>BC.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>(</u></em><em><u>C.P.C.T)</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>(</u></em><em><u>1</u></em><em><u>.</u></em><em><u>)</u></em>

<em><u>From </u></em><em><u>Equation</u></em><em><u> </u></em><em><u>1</u></em><em><u>,</u></em>

<em><u>AB </u></em><em><u>=</u></em><em><u>BC</u></em>

<em><u>5x = 4x + 3 \\ 5x - 4x = 3 \\ x = 3</u></em>

<h2><em><u>So </u></em><em><u>AB </u></em><em><u>=</u></em><em><u> </u></em><em><u>5</u></em><em><u> </u></em><em><u>times</u></em><em><u> </u></em><em><u>3</u></em><em><u> </u></em><em><u>=</u></em><em><u>1</u></em><em><u>5</u></em></h2>
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