Solve the equation 9x^2 + 8x – 5 = 3x^2to the nearest tenth.

9514 1404 393

  x ≈ {-1.8, 0.5}

Step-by-step explanation:

I find a graphing calculator to be about the easiest way to solve these. It is convenient to put the equation into the form f(x) = 0. Here we can do that by subtracting 3x^2 from both sides.

  9x^2 +8x -5 = 3x^2 . . . . . given

  6x^2 +8x -5 = 0 . . . . . . . . subtract 3x^2

The solutions to this are the x-intercepts of the graph:

  x = -1.8  or  +0.5

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.

if she was to only spend a dollar she can get 1lb

step-by-step explanation: