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 Test Calculators and Practice Answers archive Word Problems Lessons In Depth

 Question 99926: Which of the following numbers are composite? 79, 41, 5, 64 Click here to see answer by doukungfoo(195)

 Question 100255: From the information in the table providing values of f(x) and g(x), evaluate (f o g)^-1 (2) x 1 2 3 4 5 f(x) 3 4 5 1 2 g(x) 5 4 2 3 1 Click here to see answer by stanbon(57347)

 Question 100638: Are lines L1 through points (-3,2) and (0,4) and L2 through points (2,3) and (5,1) perpendicular? Click here to see answer by checkley71(8403)

 Question 100639: Find the slope of all lines perpendicular to the line given by 5x+y=5 Click here to see answer by tutorcecilia(2152)

 Question 100640: Write the equation of the line passing through (7,4) and (14,12) Click here to see answer by checkley71(8403)

 Question 100637: Decide which of the two methods for graphing lines------the intercept method or the splope intercept method-----is more appropricate for graphing the equation 4x-9=39 Click here to see answer by tutorcecilia(2152)
 Question 100637: Decide which of the two methods for graphing lines------the intercept method or the splope intercept method-----is more appropricate for graphing the equation 4x-9=39 Click here to see answer by checkley71(8403)

 Question 100635: Write the equation of a line with slope -5/6 and y-intercept (0,-5) Click here to see answer by checkley71(8403)

 Question 100633: Find the slope and y-intercept of the equation y=-1/7x-10 Click here to see answer by checkley71(8403)
 Question 100633: Find the slope and y-intercept of the equation y=-1/7x-10 Click here to see answer by tutorcecilia(2152)

 Question 100855: Evaluate the expression x4 -9x2+4x+8 for x=0 (the 4 and 3 are up high to the left of the x and -9) Click here to see answer by stanbon(57347)

 Question 100854: Describe the graph of 3x+y<1 a) a dotted line with shading below the boundary line 3x+y=1 b) a solid line with shading abouve the boundary line 3x+y=1 c) a solild line wtih shading below the boundary line 3x+y=1 d) a dotted line with shading above the boundary line 3x+y=1 Click here to see answer by stanbon(57347)

 Question 100852: Write the equation of the line through points (-5,2) and (3,6) Click here to see answer by vincy_fyah(4)

 Question 101046: solve a literal equation for one of the variables: 1. solve for y:2x+3y=9 2. solve for x: 5x+4y+20=0 3. solve the formula for L:P=2L+2W 4. solve the formula for R: E=IR simply expression with rational exponets 5. simplify: (b with neg.2/3 power)neg.6th exponet 6.simplify: square root of 16a to the 4th power Click here to see answer by stanbon(57347)

 Question 101105: A 29-ft board is cut into two peices, one of which is 13ft longer than the other. How long is each peice? Click here to see answer by checkley71(8403)

 Question 101137: Jeremy inherits \$18,000 and invests part of the money in bonds with an intrest rate of 11%. The remainder of the money is in savinga at a 9% rate. What amount has he invested at each rate if he receives \$1,820 in interest for 1 year? Click here to see answer by checkley71(8403)

 Question 101139: Solve the following system by substitution 8x-2y=6 y=4x-3 Click here to see answer by checkley71(8403)

 Question 101294: Write the equation of a line with slope -5/6 and y-intercept (0,5) Click here to see answer by doukungfoo(195)

 Question 101289: Find the slope of the line containing points with coordinates (-6,4) and (5,4) Click here to see answer by doukungfoo(195)

 Question 101529: The length of a rectangle is 1 cm longer than the width. If the DIAGONAL of the rectangle is 4 cm, what are the dimensions (of the length and width) of the rectangle?? I can get my answer of 2.284 cm and 3.284 cm but... I need to show step by step how I got my answer, this is where I keep writing it out wrong. Please help... Click here to see answer by bucky(2189)

 Question 102323: Help me solve this question: I am a 2-Dimensoinal figure. I have two pairs of parallel sides. None of my angles is a right angle. All my sides are the same length. What am I? Click here to see answer by edjones(7569)

 Question 102451: The demand and supply equations for a certain item are given by D = –5p + 40 S = –p2 + 30p – 8 Find the equilibrium price. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Can you double check my work for me? I think it is right. A rectangular garden is to be surrounded by a walkway of constant width. The garden's dimensions are 30 ft by 40 ft. The total area, garden plus walkway, is to be 1800 ft2. What must be the width of the walkway to nearest thousandth? Answer: x=3.860 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Is the following trinomial a perfect square? x2 – 18x + 81 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Identify the axis of symmetry, create a suitable table of values, then sketch the graph (including the axis of symmetry). y = –x2 + 1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Click here to see answer by edjones(7569)

 Question 102449: Find the equation of the line satisfying the given conditions: perpendicular to the graph of y + 6 = -1 / 3x and passes through the point at (-4, -5). Find the equation of the line satisfying the given conditions: parallel to the x-axos and passes through the point (-5, -3). Use slope to show that (triangle symble)ABC with vertices A(0,2), B(2,3) and C(1,5) is a right triangle. Click here to see answer by stanbon(57347)

 Question 101675: A store marks up items to make 89% profit. If an item costs \$3.50 from the supplier, what will the price be? Click here to see answer by Fombitz(13828)

 Question 103050: WRITE A NUMERICAL EQUATION THAT REPRESENTS EACH STATEMENT WHEN NEGATIVE SIX IS SUBTRACTED FROM A NUMBER Y, THE RESULT IS EIGHTEEN Click here to see answer by MathLover1(6634)

 Question 103154: Please help me: I dont really understand algebra that well and i was hopeing maybe you can help i have been really strugeling with the hole algebra corse so far this year.Im not really sure where to begin on solving the equeasion. 3a+4b-a+2c-b+3a I have got the answer but i cant seem to write it out like they are asking. thankyou Nicole Click here to see answer by MathLover1(6634)

 Question 103047: When seven is added to a number x, the result is 3 (WRITE A NUMERICAL EQUATION THAT REPRESENTS EACH STATEMENT) Click here to see answer by elima(1433)

 Question 103048: WRITE A NUMERICAL EQUATION THAT REPRESENTS EACH STATEMENT WHEN A NUMBER IS A IS DOUBLED, THE RESULT IS TWELVE Click here to see answer by elima(1433)

 Question 103808: The weights of certain machine componets are normally distrubited with a mean of 8.75g and a standard deviation of 0.07g. Find the two weights that seperate the top 3% and the bottom 3%. These weights could serve as limit used to identify which componets should be rejected. Click here to see answer by stanbon(57347)

 Question 104042: two cars pas each other traveling in opposite directions on a highway, one is goig 1.5 times as fast as the other. at the end of 3.5 hours they are 192.5 miles apart. find each cars rate. Click here to see answer by ankor@dixie-net.com(15652)

 Question 104931: im having trouble understanding how they get get the answer i was hoping maybe you can help please F=9C+32 find F if C =60 i dont see how they are getting F=180 i got 5 everything after that. thankyou, Nicole Click here to see answer by checkley75(3666)

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