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mathematics
college algebra graphs and models

Questions and Answers of College Algebra Graphs And Models

The following graph shows a weight and height chart. The weight w is listed in pounds and the height h in inches. The shaded area is a recommended region.Use the graph to find a system of linear
Complete the following for the given system of linear equations. (a) Write the system in the form AX = B. (b) Solve the linear system by computing X = A-1B with a calculator. Approximate the
The following graph shows a simple social network.Which person likes the most people in the network? Person 1 Person 3 Person 2 Person 4
The following graph shows a weight and height chart. The weight w is listed in pounds and the height h in inches. The shaded area is a recommended region.Use the graph to estimate the recommended
The following graph shows a simple social network.Which person is the least liked person in the network? Person 1 Person 3 Person 2 Person 4
The following graph shows a weight and height chart. The weight w is listed in pounds and the height h in inches. The shaded area is a recommended region.What does this chart indicate about an
Use a determinant to find the area of the triangle with vertices (-1,2), (2,4), and (3,-3).
Suppose P varies jointly with the square of x and the cube of y. If P = 432 when x = 2 and y = 3, find P when x = 3 and y = 5.
The following graph shows a simple social network.Which person is the most liked person in the network? Person 1 Person 3 Person 2 Person 4
The table shows the percent y of voter turnout in the United States for the presidential election in year x, where x = 0 corresponds to 1900. Find a quadratic function defined by f(x) = ax2 + bx + c
Complete the following. (a) Write the system in the form AX= B. (b) Solve the system by finding A-1 and then using the equation X = A-1B. 2x - 2y + z = 1 x + 3y + 2z = 3 4x - 2y + 4z = 4
The following graph shows a simple social network.Use a matrix to represent this social network. Person 1 Person 3 Person 2 Person 4
Complete the following. (a) Write the system in the form AX = B. (b) Solve the system by finding A-1 and then using the equation X = A-1B. x + 2y = = = 2x + 5y = -1 -xy + 2z = 0 2
The figure shows two intersections, labeled A and B, that involve one-way streets. The numbers and variables represent the average traffic flow rates measured in vehicles per hour. For example, an
Nine hundred tickets are sold for a concert, generating $7500 in revenue. The prices of the tickets are $6 for children, $7 for students, and $10 for adults. One hundred and fifty more adult tickets
Suppose that the number of vehicles entering intersection A from the west varies between 400 and 600. If all other traf- fic flows remain the same as in the figure, what effect does this have on the
Use a determinant to find the area of the triangle whose vertices are (0, 0), (5,2), and (2, 5).
A student takes out two loans totaling $5000 to help pay for college expenses. One loan is at 4% interest and the other is at 3% interest. If the total interest is $173 after 1 year, how much did the
Design a 3 x 3 matrix A that represents a digital photograph of the letter T in black on a white background. Find a matrix B such that adding B to A darkens only the white background by one gray
A rectangle has a perimeter of 60 inches and an area of 209 square inches. Find its dimensions.
Restrict the domain of f(x) so that f is one-to-one. Then find f-1(x). f(x) = (x - 2)2² +4
For each graph (a-d) give its domain, range, and the intervals where it is increasing or decreasing. b. 4 2 N 3 r 7 'P C. 4 N - 7 -3
The graph of y = f(x) is shown in the figure. Sketch a graph of each equation using translations of graphs and reflections. Do not use a graphing calculator f(x) = 2x (a) y = 2 - 2 (b) y = 2-1 (c) y
Complete the follow- ing for the given graph of an exponential function f. (a) Give the domain and range of f. (b) Identify intervals where f is greater than I and where is f less than 1. (c)
Restrict the domain of f(x) so that f is one-to-one. Then find f-1(x). f(x)=x²-1
The equations are identities because they are true for all real numbers. Use properties of logarithms to simplify the expression on the left side of the equation so that it equals the expression on
Complete the following for the given graph of an exponential function f. (a) Give the domain and range of f. (b) Identify intervals where f is greater than I and where is f less than 1. (c)
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 3(10³-²) = 72
Use the given f(x) and g(x) to find each of the following. Identify its domain. (a) (fog)(x) (b) (gof)(x) (c) (f•f)(x)
The graph of y = f(x) is shown in the figure. Sketch a graph of each equation using translations of graphs and reflections. Do not use a graphing calculator f(x) = -0.5x (a) y = -0.5x (b) y = -0.5x
The equations are identities because they are true for all real numbers. Use properties of logarithms to simplify the expression on the left side of the equation so that it equals the expression on
Use the change of base formula to approximate the logarithm to the nearest thousandth. log225
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 4(3) 3 13 =
Restrict the domain of f(x) so that f is one-to-one. Then find f-1(x). f(x) = x²/3 + 1
Use the change of base formula to approximate the logarithm to the nearest thousandth. log,67
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 5(7) + 3 = 83
For each graph (a-d) give a different situation that each graph (a-d) could model.Data from Exercises 75Match the situation with the graph (a-d) that models it best. (i) Balance in an account after
Restrict the domain of f(x) so that f is one-to-one. Then find f-1(x). f(x) = 2(x + 3)²/3
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. et + 1 = 24
The given equations are in quadratic form. Solve and give the exact solutions. 6e + 8 = 0
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 1-2e³ = -5
Restrict the domain of f(x) so that f is one-to-one. Then find f-1(x). f(x)=√9 - 2x²
Use the change of base formula to approximate the logarithm to the nearest thousandth. log, 130
Restrict the domain of f(x) so that f is one-to-one. Then find f-1(x). f(x)= V25-x²
Use the change of base formula to approximate the logarithm to the nearest thousandth. log,0.77
The given equations are in quadratic form. Solve and give the exact solutions. 8e + 150
Suppose that (0, b) is the y-intercept on the graph of a one-to-one function f. What is the x-intercept on the graph of f-1? Explain your reasoning.
Let f(x) = ax + b with a ≠ 0. (a) Show that f-1 is also linear by finding f-1(x). (b) How is the slope of the graph of f related to the slope of the graph of f-1?
Find a formula for f-1(x). Identify the domain and range of f-1. Verify that f and f are inverses. f(x) = -4x
The given equations are in quadratic form. Solve and give the exact solutions. 2e²x + e* = 6
Use the change of base formula to approximate the logarithm to the nearest thousandth. 5log, 25
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 2 + 1 = 15
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 3-5 = 125
There are initially 4000 bacteria per milliliter in a sample, and after 1 hour their concentration increases to 6000 bacteria per milliliter. Assume exponential growth. (a) How many bacteria are
A pan of boiling water with a temperature of 100°C is set in a room with a temperature of 20°C. The water cools to 50°C in 40 minutes. (a) Find values for T0, D, and a so that the formula
The given equations are in quadratic form. Solve and give the exact solutions. 3e²x + 2 = 1
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. Se 5e + 2 = 20
Find a formula for f-1(x). Identify the domain and range of f-1. Verify that f and f are inverses. f(x) = 7x
Use the change of base formula to approximate the logarithm to the nearest thousandth. 3log, 105
The given equations are in quadratic form. Solve and give the exact solutions. (log₂x)² + log₂x = 2
Graph y = f(x). Then use transformations to graph y = g(x) on the same xy-plane. Use your graph to identify the domain and range of function g. f(x) = 2*, g(x) = 2x+1
Find a formula for f-1(x). Identify the domain and range of f-1. Verify that f and f are inverses. f(x) = 6-x
Use the change of base formula to approximate the logarithm to the nearest thousandth. -21og₂ 0.65
The total number of gallons of water passing through a pipe after x seconds is computed by f(x) = 10x. Another pipe delivers g(x) = 5x gallons after x seconds. Find a function / that gives the volume
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 2e³x = -10 6-2e³x
Match the situation with the graph (a-d) that models it best. (i) Balance in an account after x years earning 10% interest compounded continuously (ii) Balance in an account after x years earning
The given equations are in quadratic form. Solve and give the exact solutions. (log.x)² - 6 log.x = 7
Graph y = f(x). Then use transformations to graph y = g(x) on the same xy-plane. Use your graph to identify the domain and range of function g. f(x) = 2*, g(x) = 2x+² + 1
Find a formula for f-1(x). Identify the domain and range of f-1. Verify that f and f are inverses. f(x) = 1-2x
Use the change of base formula to approximate the logarithm to the nearest thousandth. -5log70.05
Solve each equation. Use the change of base formula to approximate exact answers to the nearest hundredth when appropriate. 8 – 3(2)05x = −40
The given equations are in quadratic form. Solve and give the exact solutions. (In x)² + 16 xul = 91 =
Graph y = f(x). Then use transformations to graph y = g(x) on the same xy-plane. Use your graph to identify the domain and range of function g. = -3* -3° f(x) = 3*, g(x) =
The figures show graphs of a function f that converts fluid ounces to pints and a function g that converts pints to quarts. Evaluate each expression. Interpret the results. (a) (b) f¹(1) (c) (f¹
Solve each equation. Approximate answers to four decimal places when appropriate. (a) log x = 1 (b) log x= -4 (c) log x = 0.3
Solve each equation. Approximate answers to four decimal places when appropriate. (a) log₂x = 6 (b) log3x = -2 (c) lnx = 2
The following equations cannot be solved symbolically. Solve these equations graphically and round your answers to the nearest hundredth. Xe xet - 1 = 0
Find a formula for f-1(x). Identify the domain and range of f-1. Verify that f and f are inverses. f(x) = 5x 15
Let aij and bij be general elements for the given matrices A and B. (a) Identify a12, b32, and b22. (b) Compute a11b11 + a12b21 + a13b31- (c) If possible, find a value for x that makes A = B.
Graph y = f(x). Then use transformations to graph y = g(x) on the same xy-plane. Use your graph to identify the domain and range of function g. f(x) = 2*, g(x) = 1 - 2³
Find a formula for f-1(x). Identify the domain and range of f-1. Verify that f and f are inverses. f(x)=√x - 5, x ≥ 5
Graph the solution set to the inequality. y=x+1
A car tire has a small leak, and the tire pressure in pounds per square inch after / minutes is given by P(t) = 32e-02t. After how many minutes is the pressure 15 pounds per square inch?
Find a formula for f-1(x). Identify the domain and range of f-1. Verify that f and f are inverses. f(x) = (x + 3)², x ≥ −3
Solve the system of four equations with four variables. w + x + 2y = z = 4 5 2w + x + 2y + z = -w + 3x + y = 2z = -2 3w + 2x + y + 3z = 3
Let aij and bij be general elements for the given matrices A and B. (a) Identify a12, b32, and b22. (b) Compute a11b11 + a12b21 + a13b31- (c) If possible, find a value for x that makes A = B.
Evaluate d(13, 18) if d(x, y) = √(x - 1)² + (y − 2)².
Graph the solution set to the inequality. у < 3x
State the dimension of each matrix. 2
Solve the system of four equations with four variables. 2w5x + 3y - 2z = -13 3w + 2x + 4y = 9z = -28 4w + 3x - 2y - 4z = -13 5w4x - 3y + 3z = 0
Solve the nonlinear system of equations using the method of substitution. 2x² - y = 0 3x + 2y = 1
Determine if B is the inverse matrix of A by calculating AB and BA. ¹=[32] 54 B = 4-3 4 -5
Determine if B is the inverse matrix of A by calculating AB and BA. -38 -[ B = -4 1 -2 0.5
State the dimension of each matrix. a b de С b
If possible, find values for x and y so that the matrices A and B are equal. x ^ = [_-2²₂²]. 12 -[4] -2 y. B =
Graph the solution set to the inequality. x=y+2
Solve the system of equations by using elimination. 3x-2y = 4 -x + бу = 8
State the dimension of each matrix. [ -4
Evaluate the function for the indicated inputs and interpret the result.A(20, 35), where A(w, 1) = wl (A computes the area of a rectangle with width w and length 1.)
Evaluate the function for the indicated inputs and interpret the result.A(5,8), where A(b, h) = 1/2bh (A computes the area of a triangle with base b and height h.)

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