Serena is checking her work with Joaquin and finds that they disagree on a problem. Here’s what Serena wrote: 3x + 3 ≤ −2x + 5
3x ≤ −2x + 2
x ≤ 2

Is she right? Explain.

What is the missing step in this proof ?

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?