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i Safari File Edit View History Bookmarks Develop Window Help www-awhaleks.com Mathway | Math Problem Solver ALEKS - Homework 4 Lueda Goxhaj x*2ty*2+Bx-2y+B 0 - Step-by-Step Calculator Syrnbolab _MATH 21 Online - Fall 2017 -Homework 4 | 11 of 15 Lueda 5 6 Suppose that the functions r and s are defined for all real numbers x as follows. r(x) = x + 3 (x)-4x Write the expressions for (rs)(r) and (r+s) (x) and evaluate (-s)(-1) 0 Worked Example Save For Later Submit Assignment O 2017 McGraw-Hill Education. All Rights Reserved. Terms of Use I Privacy Accessibility

Explanation / Answer

r(x)=x+3

s(x)=4x2

r.s(x)=r(s(x))=r(4x2)=4x2+3

(r+s)(x)=r(x)+s(x)=x+3+4x2=4x2+x+3

(r-s)(-1)=r(-1)-s(-1)=(-1+3)-(4(-1)2)=2-4=-2

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