284 x $1.39= $394.76
He made $394.76 washing 284 windows last week
<span>50b 50=11b 95 collect the like terms
50b-11b=95-50
39b=45 divide both sides by 39
b=1.2</span>
The answer is 2.2 , you divide 99/45
You can, it's not as hard as you might think
simply multiply the speed by the fraction of time
23 × 1/5 = 23/5 = 4 3/5 = 4.6
-13 becomes +13. 0 stays 0. 13 + 0 is 13, which is your answer.