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Factor 2x^2+19x+12

39

Step-by-step explanation:

you just put it in a calculator

The expression is not factorable with rational numbers.

2x^2+19x+12

Step-by-step explanation:

5 hr

Step-by-step explanation:

totalcost(x) = $10 + ($4/hr)x = $30

Solve this for x.  Start by subtracting $10 from boths sides, obtaining:

($4/hr)x = $30 - $10, or

($4/hr)x = $20

Dividing both sides by ($4/hr), we get x = ($20) / ($4/hr)  = 5 hr