Solve.Amy teaches Chinese lessons for $95 per student for a 6-week session. From one group of students, she collects $3800. Find how many students are in the group.
A. 42 students
B. 44 students
C. 40 students
D. 30 students
Answer: C
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Factor the expression completely.9x5 - 100x
A. x(3x2 + 10)(x + 1)(x - 1) B. (3x2 + 10)(3x2 - 10) C. x(3x2 + 10)(3x2 - 10) D. prime
Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the semicircle y = 
A. 
= 
, 
= 0
B. 
= 0, 
= 
C. 
= 0, 
= 
D. 
= 
, 
= 
Write a matrix equation equivalent to the system of equations.9x + 9z = 27 6y + 5z = 354x + 7y + 5z = 48
A.
  =  |
B.
=
C.
=
D.
= 
Solve the problem.A 3-oz serving of roasted, skinless chicken breast contains 140 calories, 27 grams of protein, and 3 grams of fat. A broccoli spear contains 50 calories, 5 grams of protein, and 1 gram of fat. A cup of whole milk contains 150 calories, 8 grams of protein, and 8 grams of fat. The amount of calories, protein, and fat in one serving of chicken breast can be represented by the matrix 
. Find the matrices B and M for the amounts of calories, protein, and fat in a broccoli spear and a cup of whole milk, respectively, and write the matrix 
which
represents the calories, protein, and fat in 4 servings of chicken, 5 servings of broccoli, and 4 cups of whole milk.
A. 
B. 
C. 
D. 