813-64 r²+r-8 factoring by grouping

how do I solve

By decreasing each dimension by 1 unit, the area of a rectangle decreased from 30 square feet to 18 square feet. Find the percent decrease in area

7/9x-4/9x=1/4+5/12 what is the value of x

What are these fractions in simplest form: 14/19, 4/32, 2/9, 23/31

Perimeter and circumference are both measurements of length. True or False

Given: ΔABC; b = 10; c = 14, and ∠A = 54°. Find the length of side a to the nearest whole number.

A farmer hears a weather report saying that temperatures will be decreasing approximately 6∘ 6∘ every hour for the next 5 hours. What signed number represents the total change in temperature expected over the next 5 hours

B) Order these measurements from greatest to least. Explain how you decided. 2,300 L 500 ml 3,000 mL 2 L 22 L

A bag contains 10 quarters and 5 nickels. Determine whether the events of picking a nickel first and then a quarter without replacement are independent or dependent. Then identify the indicated probability.

Which of these colonial American ideas came from the English Bill of Rights? 1. All citizens have basic rights. 2. Citizens can govern themselves 3. Government should have limited power 4. The press must be free

It takes a word processor 45 minutes to word process and spell check 6 pages. Find how long it takes her to word process and spell check 22 pages.