Algebra 1 : Algebra 1

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #59 : How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with the following endpoints:

\(\displaystyle (4,9)(-2,-1)\)

Possible Answers:

\(\displaystyle (4,0)\)

\(\displaystyle (1,4)\)

\(\displaystyle (-1,4)\)

\(\displaystyle (-1,-4)\)

Correct answer:

\(\displaystyle (1,4)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (4,9) and (-2,-1) plug in the numbers and solve:

\(\displaystyle (\frac{-2+4}{2},\frac{-1+9}{2})=(\frac{2}{2},\frac{8}{2})=(1,4)\)

 

This gives a final answer of  \(\displaystyle (1,4)\)

Example Question #61 : How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with the following endpoints:

\(\displaystyle (2,1)(8,3)\)

Possible Answers:

\(\displaystyle (5,2)\)

\(\displaystyle (6,1)\)

\(\displaystyle (2,5)\)

\(\displaystyle (4,4)\)

Correct answer:

\(\displaystyle (5,2)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (2,1) and (8,3) plug in the numbers and solve:

\(\displaystyle (\frac{2+8}{2},\frac{1+3}{2})=(\frac{10}{2},\frac{4}{2})=(5,2)\)

 

This gives a final answer of  \(\displaystyle (5,2)\)

Example Question #71 : Midpoint Formula

Find the midpoint of the line segment with the following endpoints:

\(\displaystyle (-12,-2)(6,4)\)

Possible Answers:

\(\displaystyle (-3,1)\)

\(\displaystyle (6,2)\)

\(\displaystyle (3,1)\)

\(\displaystyle (-4,3)\)

Correct answer:

\(\displaystyle (-3,1)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (-12,-2) and (6,4) plug in the numbers and solve:

\(\displaystyle (\frac{-12+6}{2},\frac{-2+4}{2})=(\frac{-6}{2},\frac{2}{2})=(-3,1)\)

 

This gives a final answer of  \(\displaystyle (-3,1)\)

Example Question #72 : Midpoint Formula

Find the midpoint of the line segment with the following endpoints:

\(\displaystyle (2,5)(6,15)\)

Possible Answers:

\(\displaystyle (4,10)\)

\(\displaystyle (7,6)\)

\(\displaystyle (9,3)\)

\(\displaystyle (10,4)\)

Correct answer:

\(\displaystyle (4,10)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (2,5) and (6,15) plug in the numbers and solve:

\(\displaystyle (\frac{2+6}{2},\frac{5+15}{2})=(\frac{8}{2},\frac{20}{2})=(4,10)\)

 

This gives a final answer of  \(\displaystyle (4,10)\)

Example Question #73 : Midpoint Formula

Find the equation of the line segment with the following endpoints:

\(\displaystyle (3,-2)(9,10)\)

Possible Answers:

\(\displaystyle (3,5)\)

\(\displaystyle (6,4)\)

\(\displaystyle (-2,3)\)

\(\displaystyle (4,-6)\)

Correct answer:

\(\displaystyle (6,4)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (3,-2) and (9,10) plug in the numbers and solve:

\(\displaystyle (\frac{3+9}{2},\frac{-2+10}{2})=(\frac{12}{2},\frac{8}{2})=(6,4)\)

 

This gives a final answer of  \(\displaystyle (6,4)\)

Example Question #65 : How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with the following endpoints:

\(\displaystyle (-2,-4)(4,6)\)

Possible Answers:

\(\displaystyle (-3,-2)\)

\(\displaystyle (2,2)\)

\(\displaystyle (-1,1)\)

\(\displaystyle (1,1)\)

Correct answer:

\(\displaystyle (1,1)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (-2,-4) and (4,6) plug in the numbers and solve:

\(\displaystyle (\frac{-2+4}{2},\frac{-4+6}{2})=(\frac{2}{2},\frac{2}{2})=(1,1)\)

 

This gives a final answer of  \(\displaystyle (1,1)\)

Example Question #66 : How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with the following endpoints:

\(\displaystyle (12,5)(8,7)\)

Possible Answers:

\(\displaystyle (7,15)\)

\(\displaystyle (10,6)\)

\(\displaystyle (12,9)\)

\(\displaystyle (20,6)\)

Correct answer:

\(\displaystyle (10,6)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (12,5) and (8,7) plug in the numbers and solve:

\(\displaystyle (\frac{12+8}{2},\frac{5+7}{2})=(\frac{20}{2},\frac{12}{2})=(10,6)\)

 

This gives a final answer of  \(\displaystyle (10,6)\)

Example Question #67 : How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with the following endpoints:

\(\displaystyle (7,7)(1,1)\)

Possible Answers:

\(\displaystyle (3,3)\)

\(\displaystyle (5,5)\)

\(\displaystyle (4,4)\)

\(\displaystyle (8,8)\)

Correct answer:

\(\displaystyle (4,4)\)

Explanation:

Finding the midpoint of a line segment only requires that we find the midpoint, or average of both the x and y components. In order to do that, we use the following formula:

\(\displaystyle (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})\)

For the points (7,7) and (1,1) plug in the numbers and solve:

\(\displaystyle (\frac{7+1}{2},\frac{7+1}{2})=(\frac{8}{2},\frac{8}{2})=(4,4)\)

 

This gives a final answer of  \(\displaystyle (4,4)\)

Example Question #68 : How To Find The Midpoint Of A Line Segment

Find the midpoint of a line with the endpoings (0, 5) and (7, 1).

Possible Answers:

\(\displaystyle (4, 2)\)

\(\displaystyle (3.5, 3)\)

\(\displaystyle (3, 3.5)\)

\(\displaystyle (-7, 4)\)

\(\displaystyle (7, 6)\)

Correct answer:

\(\displaystyle (3.5, 3)\)

Explanation:

When finding the midpoint between two points, we use the midpoint formula

\(\displaystyle (\frac{x_1 + x_2}{2}, \frac{y_1+y_2}{2})\)

where \(\displaystyle (x_1, y_1)\) and \(\displaystyle (x_2, y_2)\) are the points given. 

 

Knowing this, we can substitute the values into the formula.  We get

\(\displaystyle (\frac{0 + 7}{2}, \frac{5 + 1}{2})\)

\(\displaystyle (\frac{7}{2}, \frac{6}{2})\)

\(\displaystyle (3.5, 3)\)

 

Therefore, \(\displaystyle (3.5, 3)\) is the midpoint.

Example Question #10 : Midpoint Formula

Find the midpoint of a line with the endpoings (3, 4) and (-1, -1).

Possible Answers:

\(\displaystyle \left(1, \frac{3}{2}\right)\)

\(\displaystyle (-3, -4)\)

\(\displaystyle \left(\frac{3}{2}, 1\right)\)

\(\displaystyle (4, 5)\)

\(\displaystyle (2, 3)\)

Correct answer:

\(\displaystyle \left(1, \frac{3}{2}\right)\)

Explanation:

When finding the midpoint between two points, we use the midpoint formula

\(\displaystyle \left(\frac{x_1 + x_2}{2}, \frac{y_1+y_2}{2}\right)\)

where \(\displaystyle (x_1, y_1)\) and \(\displaystyle (x_2, y_2)\) are the points given. 

 

Knowing this, we can substitute the values into the formula.  We get

\(\displaystyle \left(\frac{3 + -1}{2}, \frac{4 + - 1}{2}\right)\)

\(\displaystyle \left(\frac{3-1}{2}, \frac{4-1}{2}\right)\)

\(\displaystyle \left(\frac{2}{2}, \frac{3}{2}\right)\)

\(\displaystyle \left(1, \frac{3}{2}\right)\)

 

Therefore, \(\displaystyle \left(1, \frac{3}{2}\right)\) is the midpoint.

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