Hello, Can someone please help me with question 3,4 and 5. My sister lives in an

Question

Hello,

Can someone please help me with question 3,4 and 5.

My sister lives in an apartment complex. Her rent last year was $400 dollars, and 70 families lived there. This year, the rent increased 10%,and now only 65 families rent apartments in 3. the complex. (400, TO (4401 &S; 100 Write a linear equation that gives the number of families living in my sister's a. apartment complex as a function of rent. 4140 -100 1 fck) = b. What is the x-intercept? (solve for it numerically) 960 c. What does the x-intercept represent? the rent when families are in the Com

Explanation / Answer

3. g) total rent = z = xy = x(-x/8 + 120) =>   z = -x2/8 + 120x

h) to maximize z, dz/dx = -x/4 + 120 = 0 => x = 480

i) zmax = 480(-480/8 + 120) = 480 x 60 = 28800

5. 3x100 - 2x98 + 5x72 + 3x43 -12x2 + 7 = (x-1)(3x99 + 3x98 + x97 + x96 +.....x72 + 6x71 + 6x70......+ 6x43 + 9x42 + 9x41 +........9x2 - 3x - 3) + 4

Reminder is 4

4. Domain is [-2, infinity)

Range is [0, infinity)

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