Solve the equation and state the solution set.
+ 7 = 
A. 
B. 
C. 
D. 
Answer: B
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Find the center of mass of a thin plate covering the given region with the given density function.The region bounded below by the parabola 
and above by the line 
, with density 
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Write a formula for the nth term of the arithmetic sequence. Use the formula to find the 20th term of the sequence.29, 24 , 19, 14, . . .
A. an = -5n + 29; a20 = -71 B. an = 5n - 29; a20 = 71 C. an = -5n + 34; a20 = -66 D. an = 5n - 34; a20 = 66
Provide an appropriate response.Two types of chickens, A and B, are raised in a chicken coop. Each day they receive 1.4 kilograms of corn and 2.4 kilograms of millet. Each chicken of type A requires 100 grams of corn and 150 grams of millet. Each chicken of type B requires 60 grams of corn and 120 grams of millet. How many of each type of chicken will the corn and millet support so that all of the food is consumed each day? Use a graphing calculator to solve the system by finding the point of intersection of the two equations.
What will be an ideal response?
Solve the investment problem.Roberto invested some money at 7%, and then invested $3000 more than twice this amount at 12%. His total annual income from the two investments was $4700. How much was invested at 12%?
A. $31,000 B. $9000 C. $3100 D. $28,000