Application Exercises The maximum heart rate, in beats per minute, that yon should achieve during exercise is 220 minus your age: 220 - a. This algebraic expression gives maximum heart rate in terms of age, a. The following bar graph shows the target heart rate ranges for four types of exercise goals. The lower and upper limits of these ranges are fractions of the maximum heart rate, 220 - a . Exercises 129-130 are based on the information in the graph. If your exercise goal is to improve cardiovascular conditioning, the graph shows the following range for target heart rate, H , in beats per minute: Lower limit of range H = 7 10 ( 220 − a ) Upper limit of range H = 4 5 ( 220 − a ) . a. What is the lower limit of the heart rate range, in beats per minute, for a 20-year-old with this exercise goal? b. What is the upper limit of the heart rate range, in beats per minute, for a 20-year-old with this exercise goal?
Application Exercises The maximum heart rate, in beats per minute, that yon should achieve during exercise is 220 minus your age: 220 - a. This algebraic expression gives maximum heart rate in terms of age, a. The following bar graph shows the target heart rate ranges for four types of exercise goals. The lower and upper limits of these ranges are fractions of the maximum heart rate, 220 - a . Exercises 129-130 are based on the information in the graph. If your exercise goal is to improve cardiovascular conditioning, the graph shows the following range for target heart rate, H , in beats per minute: Lower limit of range H = 7 10 ( 220 − a ) Upper limit of range H = 4 5 ( 220 − a ) . a. What is the lower limit of the heart rate range, in beats per minute, for a 20-year-old with this exercise goal? b. What is the upper limit of the heart rate range, in beats per minute, for a 20-year-old with this exercise goal?
Solution Summary: The author explains that the lower limit of heart rate during exercise for a 20-year-old is 140 beats per minute. The upper limit is 160.
The maximum heart rate, in beats per minute, that yon should achieve during exercise is 220 minus your age:
220 - a.
This algebraic expression gives maximum heart rate in terms of age, a.
The following bar graph shows the target heart rate ranges for four types of exercise goals. The lower and upper limits of these ranges are fractions of the maximum heart rate, 220 - a. Exercises 129-130 are based on the information in the graph.
If your exercise goal is to improve cardiovascular conditioning, the graph shows the following range for target heart rate, H, in beats per minute:
Lower limit of range
H
=
7
10
(
220
−
a
)
Upper limit of range
H
=
4
5
(
220
−
a
)
.
a. What is the lower limit of the heart rate range, in beats per minute, for a 20-year-old with this exercise goal?
b. What is the upper limit of the heart rate range, in beats per minute, for a 20-year-old with this exercise goal?
The 2x2 linear system of equations -2x+4y = 8 and 4x-3y = 9 was put into the following
-2 4
8
augmented matrix:
4
-3
9
This augmented matrix is then converted to row echelon form. Which of the following matrices is the
appropriate row echelon form for the given augmented matrix?
0
Option 1:
1
11
-2
Option 2:
4
-3 9
Option 3:
10
܂
-2
-4
5
25
1
-2
-4
Option 4:
0 1
5
1 -2
Option 5:
0
0
20
-4
5
○ Option 1 is the appropriate row echelon form.
○ Option 2 is the appropriate row echelon form.
○ Option 3 is the appropriate row echelon form.
○ Option 4 is the appropriate row echelon form.
○ Option 5 is the appropriate row echelon form.
Let matrix A have order (dimension) 2x4 and let matrix B have order (dimension) 4x4.
What results when you compute A+B?
The resulting matrix will have dimensions of 2x4.
○ The resulting matrix will be a single number (scalar).
The resulting matrix will have dimensions of 4x4.
A+B is undefined since matrix A and B do not have the same dimensions.
If
-1
"[a446]-[254]
4b
=
-1
, find the values of a and b.
○ There is no solution for a and b.
○ There are infinite solutions for a and b.
O a=3, b=3
O a=1, b=2
O a=2, b=1
O a=2, b=2
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