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 Test Calculators and Practice Answers archive Word Problems Lessons In Depth

 Question 134609: An athlete runs a rate of 3 meters per second around a 400-meter track. Which equation best represents the distance covered if he has already run 2 laps? A. D=400+3s B. D=800+3s C. D=800+6s D. D=800-3s Click here to see answer by vleith(2825)

 Question 134612: A park charges an entrance fee of \$5 per car and \$2 per passenger. Which equation best represents this relationship, where C is the total cost per car and p is the number of passengers? F. C=5p+2 G. C=5(2+p) H. C=2p+5 J. C=5(2p) Click here to see answer by solver91311(17077)

 Question 134743: Given that f(x)=x^2-1 divided by x. Find the following a. V.A b. H.A c. X-intercepts d. y-intercepts Click here to see answer by solver91311(17077)

 Question 134800: If a square has a diagonal of . What is the length of a side? Click here to see answer by vleith(2825)
 Question 134800: If a square has a diagonal of . What is the length of a side? Click here to see answer by stanbon(57967)
 Question 134800: If a square has a diagonal of . What is the length of a side? Click here to see answer by solver91311(17077)

 Question 134793: A 45-foot ladder is leaning against the top of building. The bottom of the ladder is 27 feet away from the building. How tall is the building? Click here to see answer by vleith(2825)

 Question 134854: (xy^5)(x^5y)/(x^8y)^8 Click here to see answer by stanbon(57967)

 Question 135256: SOLVE THE FORMULA FOR THE SPECIFIC VARIABLE. S=2(Pie Symbol)rh + 2(Pie Symbol)r(Squared) for h Click here to see answer by Fombitz(13828)

 Question 135258: SOLVE THE EQUATION FOR Y. x=5y+3 Click here to see answer by solver91311(17077)
 Question 135258: SOLVE THE EQUATION FOR Y. x=5y+3 Click here to see answer by vleith(2825)

 Question 135817: Were supposed to square both sides. Take everything to one side and set it equal to zero. Then factor by reverse of foil. Click here to see answer by Earlsdon(6294)
 Question 135817: Were supposed to square both sides. Take everything to one side and set it equal to zero. Then factor by reverse of foil. Click here to see answer by solver91311(17077)

 Question 135863: A rental company charges \$30 a day and 15 cents per mile for renting a car. Let y be the total charges (in dollars) for a car for one day and x be the miles driven. The equation for the relationship between x and y is: Y = 30 + .15X a. How much will a person pay who rents a car one day and drives it 100 miles? b. Suppose each of 20 persons rents a car from this agency for one day and drives it 100 miles. Will each of them pay the same amount for renting a car for a day or is each person expected to pay a different amount? Explain. c. Is the relationship between X and Y exact or nonexact? d. Identify the dependent and independent variables. Click here to see answer by stanbon(57967)

 Question 135978: How to solve x=√3x-12 +4 radical sign over 3x-12 Click here to see answer by solver91311(17077)

 Question 137203: 6/13 of the athletes could complete the obstacle course. If 14 of the athletes could not complete the course, how many could complete it? Click here to see answer by vleith(2825)

 Question 137361: The direct distance between city A and city B is 200 miles. The direct distance between city B and city C is 300 miles. Which could be the direct distance city C and city A? A) 550 miles B) 650 miles C) 50 miles D) 350 miles Click here to see answer by oscargut(900)

 Question 137201: hannah and emmanuel rode their horses through the imposing forest and covered 16 miles in 3 hours. at the tree line, they slowed to half that pace. How long did it take them to travel the remaining 20 miles? Click here to see answer by ankor@dixie-net.com(15746)

 Question 137349: The direct distance between city A and city B is 200 miles. The direct distance between city B and city C is 300 miles. Which could be the direct distance city C and city A? Click here to see answer by checkley77(12569)

 Question 137319: WRITE A SLOPE-INTERCEPT EQUATION FOR A LINE WITH THE GIVEN CHARACTERISTICS. m=1/3, passes through (-1,-2) Click here to see answer by checkley77(12569)

 Question 137318: FIND THE SLOPE AND THE Y-INTERCEPT OF THE EQUATION. -2x+6y=6 Click here to see answer by checkley77(12569)

 Question 137395: FIND THE MIDPOINT OF THE SEGMENT HAVING THE GIVEN ENDPOINTS. (-SQUARE ROOT 7, 1) AND (0,SQUARE ROOT 3) Click here to see answer by stanbon(57967)

 Question 137440: ANSWER THE QUESTION. For f(x)=2x-5 and g(x)= Square Root x+2, What is the domain of f/g? Click here to see answer by oscargut(900)

 Question 137485: The water level in a 50 cm * 30 cm rectangular prism tank is 10 centimeters high. A solid object submerged in the tank raises the water level 0.05 centimeters. What is the volume of the object? A) B) C) D) Click here to see answer by oscargut(900)

 Question 137727: I've done this problem so many dfferent way that all I have done is confuse myself more and more. Please someone help me! The question is: Determine the equation of the line. Put in slope-intercept form, if possible. Through (2,8), perpendicular to 5x+8y=74 A) y=8/5x B) y=5/8x-24 C) -8/5x-24/5 D) y=8/5x+24/5 I'm thinking the answer is A, but I'm not real sure about it. Click here to see answer by solver91311(17077)
 Question 137727: I've done this problem so many dfferent way that all I have done is confuse myself more and more. Please someone help me! The question is: Determine the equation of the line. Put in slope-intercept form, if possible. Through (2,8), perpendicular to 5x+8y=74 A) y=8/5x B) y=5/8x-24 C) -8/5x-24/5 D) y=8/5x+24/5 I'm thinking the answer is A, but I'm not real sure about it. Click here to see answer by stanbon(57967)

 Question 137748: Franco works at an electronics store. He earns \$7.25 per hour plus a 5% commission on weekly sales. If he works for 40 hours and sells \$14,000 worth of merchandise, how much will he earn that week? A. \$700 B. \$900 C. \$1250 D. \$1400 Click here to see answer by solver91311(17077)

 Question 137754: There are 5 girls and 5 boys in a class. What is the probability that the first 2 students to walk into the classroom will be girls? A. 2/9 B. 1/3 C. 4/9 D. 5/9 Click here to see answer by solver91311(17077)

 Question 137753: A bag contians 4 black marbles, 6 red marbles, 9 green marbles, and 5 blue marbles. What is the probability of pulling 2 consecutive red marbles? F. 5/92 G. 7/92 H. 9/92 J. 11/92 Click here to see answer by checkley77(12569)

 Question 137786: find the inverse of the function f(x)= 3x-7 Click here to see answer by Fombitz(13828)

 Question 137897: Factoring: 2x^3 - 6x^2 + 8x Click here to see answer by checkley77(12569)

 Question 138102: Two positive numbers are in the ratio of 5:12. If their product is 960, what is the positive difference between the two numbers? Click here to see answer by stanbon(57967)

 Question 138159: Tamika has a hard rubber ball whose circumference measures 13 inches. She wants to box it for a gift but can only find cube-shaped boxes of sides 3 inches, 4 inches, 5 inches, or 6 inches. What is the smallest box that the ball will fit into with the top on? Click here to see answer by Earlsdon(6294)

 Question 138185: Find the algebraic solution for the given inequality. Write in interval notation. (3 / 2) v - 9 < 6v < (3 / 2) v + 6 Click here to see answer by stanbon(57967)

 Question 138096: write a single logarithm....please explain how you got it-I've got to learn this loga x + loga y - loga m Click here to see answer by scott8148(6628)

 Question 138086: An existing garden is the shape of a rectangle with a length of 15 ft and a width of 9 ft. A border of shrubs is to be placed around the garden. The border will have the same width all the way around the garden. Enough shrubs are needed to fill the area formed by the border. What is the width of the border? Click here to see answer by scott8148(6628)

 Question 138534: A negative number is 5 less than a second negative number. If the second number is multiplied by 2 less than the first, the product equals 8. Find the numbers. Click here to see answer by ankor@dixie-net.com(15746)

 Question 138693: The length of a rectangle is 2 less than twice the width. If the length is increased by 1 and the width is increased by 4, the resulting rectangle has an area which is 50 more than the area of the original rectangle. Find the dimensions of the original rectangle. Click here to see answer by ankor@dixie-net.com(15746)

 Question 138694: A freight train and a passenger train start toward each other at the same time from two towns that are 500 miles apart. After three hours the trains are still 80 miles apart. If the rate of the passenger train is 20 miles per hour faster than the rate of the freight train, find the rate of each train. Click here to see answer by ankor@dixie-net.com(15746)

 Question 138689: A truck traveling at a constant rate of 45 miles per hour leaves Buffalo traveling west. At the same time, a car leaves a city 800 miles west of Buffalo traveling east at a constant rate of 60 miles per hour. If both vehicles are traveling on the same highway, how far, to the nearest mile, will each vehicle travel before they meet? Click here to see answer by josmiceli(9817)

 Question 138719: T/F 1. In order to compare the characteristics of two different popuations, a sample should be extracted from each population. T/F 2. When two populations are compared and samples taken from each, the data derived from the second sample should be dependent on the data from the first sample. T/F 3. Whenever two population means are being compared, an acceptable null hypothesis is that the two population means equal each other. T/F 4. Whenever two population means equal each other, the difference between them must be zero. T/F 5. Irrespective of whether a two-tailed or one-tailed test is being conducted in order to compare two population means, the larger the differences in the sample means, the more likely that the null hypothesis will be rejected. T/F 6. A larger-sample test for the difference between two populations can be conducted safely provided either of the two samples exceed 30. T/F 7. The recommended procedure for estimating the pooled variance is to combine all the data from both samples together and calcualate the variance as if it were one sample. T/F 8. If two samples both have less than 30 observations and unknown variances, there is no statistical test that can be used to compare the population means, even if both populations are normally distributed. T/F 9. Given a paired study with 14 pretreatment measures and 14 post-treatment measures, the number of degrees of freedom for the test statistic is 28-1=27. T/F 10. The null hypothesis for the difference between two population variances is the same for both two-sided, lower-tail, and upper-tail tests. Please indicate why the question is FALSE. Click here to see answer by stanbon(57967)

 Question 139046: T F 1. One of the objectives of simple linear regression is to predict the value of the independent variable X as a linear function of the dependent variable Y. T F 2. Regression analysis is limited to establishing a relationship between two variables, X and Y. T F 3. If a deterministic relationship exists between two variables, x and y, any value of x that is selected will determine a unique value of y. T F 4. When trying to uncover relationships between variables, the recommended practice is to construct a scatter plot first before conducting a statistical analysis. T F 10. Whenever regression analysis is used to predict values of Y that are within the range of the X data, the process is known as interpolation. T F 11. Extrapolation is most advisable if it is difficult to predict what the data relationship actually is beyond the range of the existing observations. T F 12. Residuals can be computed by taking the difference between observed and predicted values of Y and squaring them to eliminate negative numbers. T F 13. The sum of the residuals that surround a regression line will always be greater than or equal to zero. T F 14. The stronger the relationship between X and Y, the closer the plotted points will be to the regression line. T F 15. If two variables are highly correlated, the correlation coefficient will be at or near zero. T F 16. The power of regression analysis is best illustrated by the fact that the presence of outliers has practically no impact on the values of the coefficients or their standard deviations. Please indicate why the answer if FALSE> Thanks. Click here to see answer by stanbon(57967)

 Question 139221: Taya and Jed collect coins. The ratio of the number of coins in their collections, in some order, is 4 to 3. If Taya has 60 coins in her collection, how many coins could Jed have? Click here to see answer by checkley77(12569)

 Question 139362: IT IS A VERBAL STRATEGIES CIRCUMFERENCE: THE CIRCUMFERENCE OF THE CLOCK WAS 42 INCHES. FIND THE DIAMETER IN INCHES. (1) 7.5 (2) 13.4 (3) 38.9 (4) 45.14 (5) 131.9 Click here to see answer by checkley77(12569)

 Question 139587: i don't really know any math and im in high school i failed it my first year and would really like help on EVERYTHING..... Click here to see answer by solver91311(17077)

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