ISEE Middle Level Math : Algebraic Concepts

Study concepts, example questions & explanations for ISEE Middle Level Math

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Example Questions

Example Question #351 : Equations

Solve for t:

Possible Answers:

Correct answer:

Explanation:

To solve, divide both sides by 22:

Answer:

Example Question #352 : Equations

Solve for b:

Possible Answers:

Correct answer:

Explanation:

To solve, divide each side by 35:

Answer:

Example Question #353 : Equations

Solve:

Possible Answers:

Correct answer:

Explanation:

To solve, find solve the exponents:

Then solve:

Answer:

Example Question #354 : Equations

Solve:

Possible Answers:

Correct answer:

Explanation:

To solve, first solve the exponents:

Then solve,

Answer:

Example Question #1 : Word Problems

Mark is three times as old as his son Brian. In ten years, Mark will be  years old. In how many years will Mark be twice as old as Brian? 

Possible Answers:

Correct answer:

Explanation:

In ten years, Mark will be  years old, so Mark is  years old now, and Brian is one-third of this, or  years old. 

Let  be the number of years in which Mark will be twice Brian's age. Then Brian will be , and Mark will be . Since Mark will be twice Brian's age, we can set up and solve the equation:

Mark will be twice Brian's age in  years.

Example Question #1 : Solving Systems Of Equations In Word Problems

Gary is twice as old as his niece Candy. How old will Candy will be in five years when Gary is  years old?

Possible Answers:

Not enough information is given to determine the answer.

Correct answer:

Explanation:

Since Gary will be 37 in five years, he is  years old now. He is twice as old as Cathy, so she is  years old, and in five years, she will be  years old.

Example Question #361 : Equations

Solve for b when f is equal to 0

Possible Answers:

No real solutions

Correct answer:

No real solutions

Explanation:

Solve for b when f is equal to 0

Let's start by plugging in 0 for f

Now, we cannot go any further, because we cannot divide by zero. 

This means that there is no value of b for which f will equal zero.

This means we have no real solutions.

Example Question #362 : How To Find The Solution To An Equation

Solve the following equation for u when y is equal to 6.

Possible Answers:

Correct answer:

Explanation:

Solve the following equation for u when y is equal to 6.

To begin, let's plug in 6 for y.

Next, bring the u over to the other side by multiplying both sides by u

Finally, divide both sides by 12 to see what u is

So we get u=2 as our answer.

Example Question #363 : How To Find The Solution To An Equation

Solve for x in the following equation:

Possible Answers:

Correct answer:

Explanation:

To solve for x, we want x to stand alone or to be by itself.  So in the equation

we want x to stand alone.  To do that, we need to cancel the  that is next to it.  The  is being multiplied to x, so to cancel it out, we will need to divide by .  If we divide by  on the left side of the equal sign, we have to divide by  on the right side of the equal sign.  So,

Now, we simplify.

 

Example Question #364 : How To Find The Solution To An Equation

Evaluate .

Possible Answers:

Correct answer:

Explanation:

To evaluate, substitute -40 in for A.

Add 40 to each side to isolate and solve for B.

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