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

Need the values IN FRACTIONS (no mixed numbers or decimals)1. -1/2^12. -1/2^23. -1/2^34. -1/2^45. -1/2^5

spread of democracy in last 15 years

Two end uses of wool

how can the boiling point of a liquid be raised without adding soluble impurity?

solve for t d=(1/2) at^2

How do you write this in a algebraic equation: 6 more than 7 times a number is 41

what is the meaning of vague and a sentence on that.

how can the boiling point of a liquid be raised without adding soluble impurity?

what is difference between kilowatt and kilowatt hour?

How do you solve the function y = 2.5^x for y=20