A sofa regularly sells for $510. The sale price is $469.20. Find the percent decrease of the sale price from regular price.

8% decrease

Step-by-step explanation:

First work out the difference decrease between the two numbers you are comparing. Then decrease the original number by the new number.Then divide the original number by the decrease and multiply the answer by 100.Next you divide the original number by the new number and multiply by 100. Finally you will get your answer.

we need the options

step-by-step explanation:

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.