Algebra II : Algebra II

Study concepts, example questions & explanations for Algebra II

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Example Questions

Example Question #2451 : Algebra Ii

If a 10-foot ladder is leaned against a wall, the height of the ladder up the wall is given by 

\(\displaystyle h(x)=\sqrt{100-x^2}\),

where \(\displaystyle x\) is the distance along the floor from the base of the ladder to the wall.

How far from the wall should the base of the ladder be in order for the ladder to reach 8 feet off the floor?

Possible Answers:

\(\displaystyle 6\)

\(\displaystyle 5\)

\(\displaystyle 4\)

\(\displaystyle 8\)

\(\displaystyle 6.5\)

Correct answer:

\(\displaystyle 6\)

Explanation:

Step 1: Plug in 8 for h(x)

\(\displaystyle 8=\sqrt{100-x^2}\)

Step 2: Square both sides

\(\displaystyle 64=100-x^2\)

Step 3: Combine like terms

\(\displaystyle x^2=36\)

Step 4: Solve.

\(\displaystyle x=6\)

Example Question #131 : Solving Equations

Solve for \(\displaystyle x\).

\(\displaystyle x+241.7=903.6\)

Possible Answers:

\(\displaystyle 661.9\)

\(\displaystyle 961.2\)

\(\displaystyle 725.2\)

\(\displaystyle 681.4\)

\(\displaystyle 841.6\)

Correct answer:

\(\displaystyle 661.9\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle x+241.7=903.6\) 

Subtract \(\displaystyle 241.7\) on both sides.

\(\displaystyle x=661.9\)

Example Question #132 : Solving Equations

Solve for \(\displaystyle x\).

\(\displaystyle x+982.1=267.8\)

Possible Answers:

\(\displaystyle -714.3\)

\(\displaystyle 845.3\)

\(\displaystyle -694.2\)

\(\displaystyle 1026.6\)

\(\displaystyle 1249.9\)

Correct answer:

\(\displaystyle -714.3\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle x+982.1=267.8\) 

Subtract \(\displaystyle 982.1\) on both sides.

\(\displaystyle x=-714.3\)

Example Question #613 : Basic Single Variable Algebra

Solve for \(\displaystyle x\).

\(\displaystyle x+457.9=-235.6\)

Possible Answers:

\(\displaystyle -745.6\)

\(\displaystyle -693.5\)

\(\displaystyle 432.1\)

\(\displaystyle 222.3\)

\(\displaystyle 338.4\)

Correct answer:

\(\displaystyle -693.5\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle x+457.9=-235.6\) 

Subtract \(\displaystyle 457.9\) on both sides.

\(\displaystyle x=-693.5\)

Example Question #614 : Basic Single Variable Algebra

Solve for \(\displaystyle x\).

\(\displaystyle x-845=1023\)

Possible Answers:

\(\displaystyle 958\)

\(\displaystyle 1868\)

\(\displaystyle 463\)

\(\displaystyle 784\)

\(\displaystyle 178\)

Correct answer:

\(\displaystyle 1868\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle x-845=1023\) 

Add \(\displaystyle 845\) on both sides.

\(\displaystyle x=1868\)

Example Question #135 : Solving Equations

Solve for \(\displaystyle x\).

\(\displaystyle x-245.6=-1023.5\)

Possible Answers:

\(\displaystyle 386.7\)

\(\displaystyle -777.9\)

\(\displaystyle 423.9\)

\(\displaystyle -823.1\)

\(\displaystyle 568.2\)

Correct answer:

\(\displaystyle -777.9\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle x-245.6=-1023.5\) 

Add \(\displaystyle 245.6\) on both sides.

\(\displaystyle x=-777.9\)

Example Question #133 : Solving Equations

Solve for \(\displaystyle x\).

\(\displaystyle x-467.8=-396.7\)

Possible Answers:

\(\displaystyle 82.3\)

\(\displaystyle 71.1\)

\(\displaystyle 68.1\)

\(\displaystyle -56.9\)

\(\displaystyle -47.7\)

Correct answer:

\(\displaystyle 71.1\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle x-467.8=-396.7\) 

Add \(\displaystyle 467.8\) on both sides.

\(\displaystyle x=71.1\)

Example Question #134 : Solving Equations

Solve for \(\displaystyle x\).

\(\displaystyle 17x=561\)

Possible Answers:

\(\displaystyle 43\)

\(\displaystyle 39\)

\(\displaystyle 55\)

\(\displaystyle 41\)

\(\displaystyle 33\)

Correct answer:

\(\displaystyle 33\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle 17x=561\) 

Divide \(\displaystyle 17\) on both sides.

\(\displaystyle x=33\)

Example Question #135 : Solving Equations

Solve for \(\displaystyle x\).

\(\displaystyle -44x=792\)

Possible Answers:

\(\displaystyle -23\)

\(\displaystyle 22\)

\(\displaystyle -18\)

\(\displaystyle 24\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle -18\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle -44x=792\) 

Divide \(\displaystyle -44\) on both sides.

\(\displaystyle x=-18\)

Example Question #136 : Solving Equations

Solve for \(\displaystyle x\).

\(\displaystyle -28x=-812\)

Possible Answers:

\(\displaystyle -39\)

\(\displaystyle 21\)

\(\displaystyle 39\)

\(\displaystyle 29\)

\(\displaystyle 31\)

Correct answer:

\(\displaystyle 29\)

Explanation:

To solve for the variable perform opposite operations to isolate it on one side of the equation with all constants on the other side.

\(\displaystyle -28x=-812\) 

Divide \(\displaystyle -28\) on both sides.

\(\displaystyle x=29\)

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