Prove that 3 (x+1) (x+7) - 2x+5) ^2 is never positive

Joshua has 22 1/2 acres of land. He is selling the land in 1/4 acre lots. How many lots does Joshua have to sell?

Anna makes 120 dolls each month to sell. This month, she increases the number of dolls she makes by 30%. How many dolls does Anna make this month?

What is the value of the expression 9 (1/2) 4 ⋅ 48? 12 15 17 18

5+5 I am very confused

Subtract - b+3 from - 11b-4 . What is the answer? -12b-1 -10b-7 10b-7 10b+7

Ling bought 3 DVDs for $15.95 each and a DVD player for $64.99. After sales tax, her total came to $119.89. What is the sales tax rate? Round your answer to the nearest hundredth, if necessary.

Let f (x) = 2x+3. The average rate of change of F (x) over any interval equals 2. A. True B. False

Robert gives roping lessons at the Sundown Corral. A 3-hour lesson costs $120.00. The cost of a lesson is proportional to the duration, in hours, of the lesson. What is the constant of proportionality in terms of dollars per hour?

If two people play tic tac toe choosing their moves randomly, what are the odds that they will tie

Candace is finding 67 x 2. She thinks the product is 124. Find and correct her mistake.