The bar graph shows the average cost of tuition and fees at private four-year colleges in the United States. Source: The College Board The formula T = 21 x 2 + 862 x + 15 , 552 models the average cost of tuition and fees, T, at private U.S. colleges for the school year ending x years after 2000. Use this information to solve Exercises 131–132. 131. a. Use the formula to find the average cost of tuition and fees at private U.S. colleges for the school year ending in 2014. b. By how much does the formula underestimate or overestimate the actual cost shown by the graph for the school year ending in 2014? c. Use the formula to project the average cost of tuition and fees at private U.S. colleges for the school year ending in 2020.
The bar graph shows the average cost of tuition and fees at private four-year colleges in the United States. Source: The College Board The formula T = 21 x 2 + 862 x + 15 , 552 models the average cost of tuition and fees, T, at private U.S. colleges for the school year ending x years after 2000. Use this information to solve Exercises 131–132. 131. a. Use the formula to find the average cost of tuition and fees at private U.S. colleges for the school year ending in 2014. b. By how much does the formula underestimate or overestimate the actual cost shown by the graph for the school year ending in 2014? c. Use the formula to project the average cost of tuition and fees at private U.S. colleges for the school year ending in 2020.
Solution Summary: The author calculates the average cost of tuition and fees at U.S. colleges for the school year ending in 2014, which is 31,736.
The bar graph shows the average cost of tuition and fees at private four-year colleges in the United States.
Source: The College Board
The formula
T
=
21
x
2
+
862
x
+
15
,
552
models the average cost of tuition and fees, T, at private U.S. colleges for the school year ending x years after 2000. Use this information to solve Exercises 131–132.
131. a. Use the formula to find the average cost of tuition and fees at private U.S. colleges for the school year ending in 2014.
b. By how much does the formula underestimate or overestimate the actual cost shown by the graph for the school year ending in 2014?
c. Use the formula to project the average cost of tuition and fees at private U.S. colleges for the school year ending in 2020.
Solve the system of equation for y using Cramer's rule. Hint: The
determinant of the coefficient matrix is -23.
-
5x + y − z = −7
2x-y-2z = 6
3x+2z-7
eric
pez
Xte
in
z=
Therefore, we have
(x, y, z)=(3.0000,
83.6.1 Exercise
Gauss-Seidel iteration with
Start with (x, y, z) = (0, 0, 0). Use the convergent Jacobi i
Tol=10 to solve the following systems:
1.
5x-y+z = 10
2x-8y-z=11
-x+y+4z=3
iteration (x
Assi 2
Assi 3.
4.
x-5y-z=-8
4x-y- z=13
2x - y-6z=-2
4x y + z = 7
4x-8y + z = -21
-2x+ y +5z = 15
4x + y - z=13
2x - y-6z=-2
x-5y- z=-8
realme Shot on realme C30
2025.01.31 22:35
f
Use Pascal's triangle to expand the binomial
(6m+2)^2
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