Bunny3200 Bunny3200

13-10-2017
Mathematics

contestada

D is the midpoint of AC. If AD = 2x + 6 and DC = 4x-7, what is the length of DC?

A. 6.5
B. 7
C. 18
D. 19

Respuesta :

texaschic101 texaschic101

13-10-2017

A----------D----------C

AD = 2x + 6
DC = 4x - 7

the midpoint D splits AC into 2 equal parts....therefore, AD = DC

2x + 6 = 4x - 7
2x - 4x = -7 - 6
-2x = - 13
x = -13/-2
x = 6.5

DC = 4x - 7......4(6.5) - 7 = 19 <===
AD = 2x + 6.....2(6.5) + 6 = 19

Answer Link

Otras preguntas

Why did Leif Eriksson become an explorer and adventurer?

The sum of a number and 3 times the same number is 100. What is the number?Equation: Solution:

What are the pH changes in the stomach before and after taking an antacid tablet?

Which phrase indicates the interior flow of thought employed in high-modern literature? a) automatic writing b) confused daze c) total recall d) stream of c

multiple choice I realy need a help!!!!! 1) Eric lives in Aurora City.He read an article in his local newspaper about a proposed ordinance increasing the local

how many legs do phytoplankton have

The arrangement of atoms in a water molecule, H₂O, is best described as (A) ring (B) trigonal planar (C) linear (D) trigonal pyramidal (E) bent

Places in India where cattle farming is done

how many legs do phytoplankton have

Simplify the polynomial.1. 4a²b + 5 - 6a³b - 3a²b + 2a³b