ally5829 ally5829
  • 01-09-2020
  • Mathematics
contestada

9. If DF = 42, find DE.
7x+1 4x-3
DEF what is DE​

Respuesta :

jadakinsinger12
jadakinsinger12 jadakinsinger12
  • 01-09-2020

Answer:

29

Step-by-step explanation:

So DF = 42, And we know that DF = DE + EF

Therefore (7x+1) + (4x-3) = 42

11x -2 = 42

11x = 44

x = 4

Substitute x = 4 onto DE equation, so 7(4) +1

= 29.

Answer Link

Otras preguntas

What is cos P?  Right triangle PQR with a short leg measuring 5, a long leg measuring 12, and the hypotenuse as 13A. 5/12B. 12/13C. 5/13D. 12/5
What is cos P?  Right triangle PQR with a short leg measuring 5, a long leg measuring 12, and the hypotenuse as 13A. 5/12B. 12/13C. 5/13D. 12/5
A 36-tooth gear turns three times. It is connected to a 12-tooth gear. How many times does the 12-tooth gear turn?
From the equations 7a = 4 and 7a + 4b = 12, one can conclude that b is? Please explain the work behind the solution
area is 320 square feet width is 4/5 length
Who were the 'KKK' and what were there intentions? (Teacher didn't tell me)
How did world war 1 contribute to the collapse of the Russian monarchy?
How do u answer 3(x+2)=x-18
Indicate true or false as to whether the following equation is quadratic 2x-4x+1=0
what did anna sofia nysten do after the titanic sinking