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 Test Calculators and Practice Answers archive Word Problems Lessons In Depth

 Question 235018: DIFFERENTIATE WITH RESPECT TO X (x - 3)(x+3) Click here to see answer by solver91311(16897)

 Question 235519: i need to factor the following: b+6-8=180 Click here to see answer by Jeff Gordon(65)

 Question 234796: Multiply 3x over 6x+3 times 14x+7 over 3 Click here to see answer by Alan3354(30993)

 Question 234772: 3 digits palindrome multiple of 2 product of my digit is smaller than my sum Click here to see answer by Alan3354(30993)
 Question 234772: 3 digits palindrome multiple of 2 product of my digit is smaller than my sum Click here to see answer by Stitch(352)

 Question 236229: An arrow is fired into the air with an initial valocity of 96ft/sec. The hieght of the arrow t seconds after it was shot into the air is given by s(t)=-16t^2 +96t. When should the arrow reach its greatest hieght. Click here to see answer by Alan3354(30993)

 Question 236223: The amount of paint needed to cover the walls of a room varies jointly as the perimeter of the room and the heightof the walls. If a room with a perimeter of 40 feet and a 10 foot walls takes 4 quarts of paint, find the amount of paint needed to cover 80 feet and 8 foot walls. Click here to see answer by rfer(12662)

 Question 236271: what do you call a coefficient multiplying a matrix? Click here to see answer by stanbon(57361)

 Question 236620: The profit that the vender makes per day by selling x pretzels is given by the function g(x)=-.004x^2+302x-500. Find the number of pretzels that must be sold to maximize profit. Click here to see answer by stanbon(57361)

 Question 236949: what is the area of a rectangle with the length of 45 cm and width of 30 cm Click here to see answer by edjones(7569)

 Question 234794: Determine the value or values of the variable where the expression is defined. 2 over x-5 Click here to see answer by solver91311(16897)

 Question 238265: A store sells turkey sandwiches for \$5.00 and ham sandwiches for \$4.00. The store sells 5 more turkey sandwiches than double the amount of ham sandwiches and the total sales are \$1089.00. How many of each are sold? Click here to see answer by alicealc(281)
 Question 238265: A store sells turkey sandwiches for \$5.00 and ham sandwiches for \$4.00. The store sells 5 more turkey sandwiches than double the amount of ham sandwiches and the total sales are \$1089.00. How many of each are sold? Click here to see answer by stanbon(57361)

 Question 238451: What is 1/3 of the difference of 90 and 36/ Click here to see answer by Fombitz(13828)

 Question 238544: how do you right an equation of a line whit the slope and y intercept m=4 b=8 Click here to see answer by Alan3354(30993)

 Question 238328: Not sure what category this would fit under...... My assignment is on substitution....I did the problems but not sure if they are right...(I was able to do the other problems on the sheet but none of them had fractions or three different variables)- can someone post the proper steps to solve the problems (so I can check it against what I have...)? 1) 6x+2y-4=0 and 10x+7y= -8 2) 2/3x+y= -5/3 and x-1/3y= -13/3 Click here to see answer by College Student(505)

 Question 238820: solve for the indicated letter f=3g, for g Click here to see answer by Alan3354(30993)

 Question 239763: a farmer has 100 meters of fence to enclose the maximum area possible. she wishes to use a river bank as a natural boundary for one side of the rectangular garden that she desires to construct. some of the fence will also be used to divide the rectangular into 4 equal rectangular sections a)what is the maximum area that cna be enclosed b) what dimensions, lenght and widht , produce the maximum area? Click here to see answer by Theo(3464)

 Question 240637: a fishing boat broke down after traveling 2 hours against a 4 km/h current. The boat was carried back to its starting point by the current. The whole trip took 5.5 hours. Find the speed of the boat in still water before the motor failed. Click here to see answer by Theo(3464)

 Question 240716: What is the slope of a binomial 2x+3' Click here to see answer by rapaljer(4667)
 Question 240716: What is the slope of a binomial 2x+3' Click here to see answer by Alan3354(30993)

 Question 240928: The angle bisectors always, never, or sometimes meet at point outside the triangle? Click here to see answer by stanbon(57361)

 Question 240961: Given that the polynomial function has the given zero, find the other zeros. f(x)= -3 is a zero. Click here to see answer by stanbon(57361)

 Question 240732: The stopping distance of (s) of a car varies directly as the square of it's speed (v). If a car traveling at 30 mph requires 63 ft to stop, find the stopping distance for a car traveling at 50 mph. Click here to see answer by ankor@dixie-net.com(15656)

 Question 240333: 2/5 = 5/10n + 2???????????????? The second one is: 7/10 = 3/8k + 1???????????????? Click here to see answer by Alan3354(30993)

 Question 241853: how do you simplify -88 + or - the square root of -4864 divided by -32 in terms of imaginary numbers? Click here to see answer by Alan3354(30993)

 Question 242015: the half life of radioactive potassium is 1.3 billion years. If ten grams are present now, how much will be present in 100 years? 1000 years? Click here to see answer by nyc_function(2733)

 Question 242124: if line ef and line gh has a slope of -4,what is the slope of gh? Click here to see answer by Alan3354(30993)

 Question 242102: how can you factor a trinomial such as (3x^2)- 14x + 6 Click here to see answer by checkley77(12569)

 Question 242311: Express the following in set builder notation B = {5,6,7,8,9,10,11,12} Click here to see answer by solver91311(16897)

 Question 242320: The mass m(t) remaining after t hours from a 50 gram sample of a radioactive substance is given by the equation m(t)= 50e^-0.0578t. after how long will 30 grams of substance remain? Click here to see answer by nerdybill(6962)