Select all of the following equation(s) that are quadratic in form. x4 – 6x2 – 27 = 0 3x4 = 2x 2(x + 5)4 + 2x2 + 5 = 0 6(2x + 4)2 = (2x + 4) + 2 6x4 = -x2 + 5 8x4 + 2x2 – 4x = 0

6(2x + 4)2 = (2x + 4) + 2

Step-by-step explanation:

A quadratic is an equation whose highest degree is 2. This means the largest exponent on the variable is 2.

All of the equations below have an exponent of 4 or highest degree 4. THese are not quadratic:

x4 – 6x2 – 27 = 0  

3x4 = 2x

2(x + 5)4 + 2x2 + 5 = 0

6x4 = -x2 + 5

8x4 + 2x2 – 4x = 0

These are quadratic:

6(2x + 4)2 = (2x + 4) + 2

On e2020 it is 1,4, and 5

Step-by-step explanation:

You and your friend used 66.7 megabytes.

Step-by-step explanation:

Hi, to answer this question we have to write an equation.

Your cell phone company:

y = 10 + 0.10 m

Where:

y: total cost

m = number of megabytes

Your friend's company:

y = 0.25m

If both paid the same, it means that

y = y

And

10 + 0.10m = 0.25m

Solving for m:

10= 0.25m-0.10m

10= 0.15m

10/0.15=m

66.7 =m

You and your friend used 66.7 megabytes.