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- If the quantities x and y are related by the equation y=3x , then we say that y is __________ _________ to x and the constant of ____________ is 3.arrow_forwardPlease help me.arrow_forwardThe construction industry was one of the hardest-hit by the recession of 2008, but housing starts began increasing again in 2010. The number of housing starts in thousands, during this time period can be modeled by three equations as follows, where x is the number of years after 2002. For 2002-2006, y = 1.1x2 +0.56x + 101 For 2007-2009, y = - 31.6x + 319 For 2010-2019, y = 6.23x-24.7 a. Create a piecewise-defined function that represents the number of housing units, in thousands, from 2002-2019, with x equal to the number of years after 2002. Valboi 1.1x2 + 0.56x + 101 if sxs H(x) = -31.6x +319 6.23x - 24.7 iarrow_forward2. Page 922 #4 a. Solve by hand using Gaussian elimination with matrices. Show all the matrix transformations with the explanation (row operation) beside it in your Word document. Be sure to write out you answer as x = ..., y =..., and z =. and tell what this means using a. ... the terms independent, dependent, consistent, and inconsistent as applicable. 3 Page 922 #10arrow_forwardSolve for x and y on both problemsarrow_forwardSolve when x(0)=2 and y(0)=3arrow_forwardIf a and ß are the roots of the equation x² – 3x + 4 = 0, the equation whose roots are a? + a + 1 and B² + B + 1 is (a) x' - 6x + 19 = 0 (b) х? + 6х - 37 %3D 0 (c) x' + 6x - 19 = 0 (d) x² - 6x + 37 = 0 If a, and B, are the roots of the equation 3x? - 2x – 5 = 0 and a, and B, are the roots of the equation 2x² + x - 7 = 0, the equation whose roots are (a,a, + B,B,) and (a,ß, + a,B,) is (a) 36x? – 12x + 911 = 0 (b) 9х* - 91х + 11 %3D0 (c) 36x? + 12x - 911 = 0 (d) 9x² + 91x – 19 = 0 3x-2 If a and B are the roots of the equation 7X- 3 5x 1 = 4, 1 isarrow_forwardIf x3 + y3 = 30, x+y =6, then 1/x+1/y = ?arrow_forwardIn a certain region, about 6% of a city's population moves to the surrounding suburbs each year, and about 2% of the suburban population moves into the city. In 2020, there were 9,750,000 residents in the city and 900,000 residents in the suburbs. Set up a difference equation that describes this situation, where x is the initial population in 2020. Then estimate the populations in the city and in the suburbs two years later, in 2022. (Ignore other factors that might influence the population sizes.) Set up a difference equation that describes this situation, where x is the initial population in 2020. x₁ = Mx0 = (Type an integer or decimal for each matrix element. Do not perform the calculation.)arrow_forward1 X- = - 12 - 3 y = - 9 X. |- | Step 1 of 4: Rewrite each of the equations without fractions or decimals. 2/3arrow_forwardWe are constructing a box from a rectangular piece of cardboard. The piece of cardboard which measures 16 inches wide and 48 inches long. We will remove a square of size “x” inches from each corner and turn up the edges. Once we remove the squares of size “x” inches from each corner and turn up the edges, we create a box: Label the dimensions of the newly created box using the variable “x”. What is the equation that represents the Volume of the box as a function of the cutsize of the box? V(x)= What is the restricted domain of this problem? (That is, what x values "make sense"?) ≤x≤ What is the restricted range of this problem? (That is, what V values "make sense"?) ≤V(x)≤ (round to 1 decimal place) To maximize the volume of the newly created box, how much should be cut from each corner? x= inches (round to 1 decimal place) What is the maximum volume the box can hold? V= in3 (round to 1 decimal place) What is the largest cutsize you can cut out of the paper and…arrow_forwardA sample of 25 families was taken for a study. The objective of the study was to estimate the factors that determine the monthly expenditure (in dollars) on food for families. The independent variables included in the analysis were the number of members in the family (x1), the number of meals eaten outside (x2), and a dummy variable (x3) that equals 1 if a family member is on a diet and equals 0 if there is no family member on a diet. The following regression results were obtained. Coefficients Standard Error Intercept 450.08 53.6 x1 49.92 9.6 x2 10.12 2.2 x3 -.60 12.0 ANOVA df SS MS Regression 3078.39 1026.13 Residual (Error) 2013.90 95.90 Total What are the degrees of freedom for the sum of squares explained by the regression (SSR) and the sum of squares due to error (SSE)? Test whether or not there is a significant relationship between the monthly expenditure…arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Algebra for College StudentsAlgebraISBN:9781285195780Author:Jerome E. Kaufmann, Karen L. SchwittersPublisher:Cengage LearningCollege AlgebraAlgebraISBN:9781305115545Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage Learning