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 Test Calculators and Practice Answers archive Word Problems Lessons In Depth

 Question 466043: A 12-foot tree casts a 16-foot shadow. How many feet tall is a nearby tree that casts a 20-foot shadow at the same time? Click here to see answer by gwendolyn(128)

 Question 467382: A tire for a compact car measures 25 inches in diameter. The car is traveling at a speed of 55 mph. Find the nearest integer, the number of revolutions per minute, RPM, the tire makes. Click here to see answer by jorel1380(2518)

 Question 467423: Simplify: 3 square root 16 is it 7 12 48 24 Click here to see answer by jim_thompson5910(28593)

 Question 467461: Seth bought a used car that had been driven 20,000 miles. After he owned the car for 2 years, the total mileage of the car was 49,400. Find the average number of miles he drove each month during those 2 years. Click here to see answer by jorel1380(2518)

 Question 467472: There are 357 seniors in Harris High School. The ratio of boys to girls is 7:10. How many boys are in the senior class? (A). 117. (B). 147. (C). 107. (D). 210 Click here to see answer by algebrahouse.com(1079)

 Question 467636: Hi i need help with ny practice test that my teacher gave me and is big package and im doing " Percent Word Problems" 1.what percent of 126 is 22 ? 2. what percent of 137.4 is 96? 3.79.9 is 90% of what ? 4.73% of what is 156.4 ? Click here to see answer by rfer(12657)

 Question 467667: 2x-14 is what an equation or inequality ? Click here to see answer by Alan3354(30993)

 Question 467525: How can I find the square root of 181 by factoring? Thank you. Click here to see answer by ankor@dixie-net.com(15649)

 Question 467845: A cable 20 feet long connects the top of a flagpole to a point on the ground that is 16 feet from the base of the pole. How tall is the flagpole? (A). 8ft. (B). 10ft. (C). 12ft. (C). 26ft Click here to see answer by mananth(12270)

 Question 467863: question: ln(x+9)-ln(x+5)=ln(x+7)-ln(x-4) I come up with x=1/3, but my answer key says "no solution". How come? Thanks, Jessica Click here to see answer by robertb(4012)

 Question 467889: I need to write a fraction in simplest form this is it: 34/51 Click here to see answer by josmiceli(9671)

 Question 468053: Complete the square. (do not solve for x.) X^2+10x+_____? Click here to see answer by Alan3354(30993)

 Question 468051: Complete the square. (do not solve for x.) X^2-3x+____? Click here to see answer by Alan3354(30993)

 Question 468101: Multiply: X^2-1 over 6 times 2 over x-1 Click here to see answer by ewatrrr(10682)

 Question 468119: Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. (6.2 • 107) / (4.15 • 103) Click here to see answer by Alan3354(30993)

 Question 468112: Raise the quantity in parentheses to the indicated exponent, and simplify the resulting expression. (-5x3y)2 -25x6y2 25x6y2 5x6y2 25x5y3 Click here to see answer by stanbon(57308)

 Question 468137: A carnival usually sells three thousand 60¢ ride tickets on a Saturday. For each 20¢ increase in price, management estimates that 70 fewer tickets will be sold. What is the smallest increase in ticket price that will produce \$2,344.00 of revenue on Saturday Click here to see answer by Theo(3458)

 Question 468208: I need a little help here: ln(x+9)-ln(x-5)=ln(x+7)-ln(x-4). Apparently there is no solution? Why not x=1/3?! Click here to see answer by Alan3354(30993)
 Question 468208: I need a little help here: ln(x+9)-ln(x-5)=ln(x+7)-ln(x-4). Apparently there is no solution? Why not x=1/3?! Click here to see answer by stanbon(57308)

 Question 468207: Help please! The following problem has two solutions: 7^(x^2)=(7^5x)/(49^3) FYI,I know that the sum of the two solutions is 5. I just need a brush-up on some exponential and logarithmic properties so I can know how to do this stuff, thanks! J Click here to see answer by stanbon(57308)

 Question 468230: I do not understand any type of algebra Click here to see answer by mananth(12270)

 Question 468228: The grounskeeper is replacing the turf on a football field. His measurements of the field are 130 yards by 60 yards. The actual measurements are 120 yards by 54 yards. Which expression represents the relative error in the measurement? (A). (120)(54)/(130)(60)-(120)(54). (B). (130)(60)-(120)(54)/(120)(54). (C). (130)(60)/(130)(60)-(120)(54). (D). (130)(60)-(120)(54)/(130)(60) Click here to see answer by edjones(7569)

 Question 468194: I am struggling with the following problem: 2e^2x+5e^x-12=0 I know that we replace e^ with u, then use quadratic formula to solve. We get u=6 or u=-16. Then, I guess we scratch the -16 because it's negative. From there I'm not sure how we are supposed to solve for x. I know that the answer is ln (3/2), but I'm not sure of the steps that go into solving for that and why the answer isn't ln3/2 or ln3/ln2, etc. Obviously you get here by setting 6=2e^2x, but I'm not sure why. Just need a brush-up on some rules here. Thanks, J Click here to see answer by mananth(12270)

 Question 468231: A builder is building a rectangular deck with dimensions of 16 feet by 30 feet. To ensure that the sides form 90 degree angles, what should each diagonal measure? (A). 30ft. (B). 34ft. (C). 46ft. (D). 16ft Click here to see answer by nerdybill(6958)