Saturday

March 28, 2015

March 28, 2015

Posted by **Juliette** on Tuesday, October 12, 2010 at 12:18pm.

5- 20x + 4 >= -3

5-4 - 20x >= -3

1 - 20x >= -3-1

-20x >= -4

x<= -15

Possible answers are

x<=3

-1/5 <= x<= 3

x >= -1/5

x >= 0

I think it is -1/5<=x<=3

because both solutions work

- Algebra-Please check -
**Reiny**, Tuesday, October 12, 2010 at 1:19pmI hate to say this, but each of your lines from

5- 20x + 4 >= -3

5-4 - 20x >= -3

1 - 20x >= -3-1

-20x >= -4

x<= -15

contains an error based on its previous line

First of all , if the question is

5 - √(20x + 4) >= -3 , then

√(20x+4) ≤ 8

consider the equation

√(20x+4) = 8

square both sides

20x+4 = 64

x = 3

so we have the region > 3 and the region < 3

A quick mental consideration in √(20x+4) ≤ 8 will show that only numbers ≤ 3 could work.

finally the inside of the square root cannot be negative,

that is,

20x + 4 ≥0

x ≥ -4/20

x ≥ -1/15

so x has to be between -1/5 and 3 , or

-1/5 ≤ x ≤ 3

- Algebra-Please check -
**Juliette**, Tuesday, October 12, 2010 at 3:18pmThank you

**Answer this Question**

**Related Questions**

math - 5(3+4x)-6>=129 I get 2 different answers on this one. 15+20x-6>=129...

Math - Find the intersection of two lines. i have the answer just please tell ...

algebra - I was wondering if my answer is right. Let f (x)=(x+10)^2. Find x so ...

algebra - Find the product (2x)(10x) Answers: 20x 12x 20x^2 5x

Algebra - Can someone tell me if I am right? Factor by group 20x^2-12x=15x-9 20x...

Microbiology - You need 3.5L of 50mM NaCl from your 20X stock. How would you ...

math - Simplify the given equation. 17x - 6 + 3x - 5 = x + 11 + 4x A)20x - 11 = ...

Algebra 1 - Are these right? xy - 3x - 8y + 24 (3x-y)-(8y+24) 8y+24 4x^2 + 20x...

Math - solve the equation 20x^3 +44x^2 -17x -5 given that -5/2 is a zero of f(x...

math,correction - Directions:Multiply Problem: ((x)/(3)+(3)/(4)) ((3x)/(4)-(3)/(...