lindseylewis313 lindseylewis313
  • 20-09-2020
  • Mathematics
contestada

If 2 - 4x = 18, evaluate x^2+ 2x – 1.

Respuesta :

christineangeline christineangeline
  • 20-09-2020

Answer:

7

Step-by-step explanation:

2 - 4x = 18

-4x = 18 - 2

-4x = 16

4x = - 16

x = -16/ 4

x= -4

substitute x=4 ,

x ^ 2 + 2x -1

-4^2 + 2×-4 - 1

16 - 8 - 1

7

Answer Link

Otras preguntas

What obligations did a peasant have to the lord of the manor?
How does a Bill become a Law?
The amount $180.00 is what percent greater than $135.00?
Which answer is correctly punctuated? Mexican food in my opinion is the most flavorful. Mexican food, in my opinion, is the most flavorful. Mexican food in
how many asylum seekers are there in the UK?
What information does the inside address of a business letter include?
Mr. Taylor raised all his students’ scores on a recent test by five points. How were the mean and the range of the scores affected? (1) The mean increase
Which unit rate is equivalent to 13 miles per gallon? twenty-six miles over two gallons : two gallons over twenty-six miles thirty-nine miles over four gallons
This is a direct characterization of William Legrand. What is the BEST inference that can be made about him.A.He is stable.B.He is moody.C.He is happy all the t
Why did Britain create Upper Canada and Lower Canada, and who lived in each colony?