Explore BrainMass
Share

# Algebra

### Writing Equations from Word Problems 1

A box with a square base has a surface area (including the top) of 3 m^2. Express the volume V of the box as a function of the width w of the base.

### 2 Problems

(See attached file for full problem description) --- 1. Make y the subject of the formula (see attached) 2. Rearrange the equation X = 1/2A In(q - 3) + c to obtain a formula for q

### Series and Annuities: The Tortoise and the Hare Series

You may have heard the fable about the tortoise and the hare. Suppose that the tortoise and the hare are running a 5000 M race. The tortoise proceeds very slowly, never changing its speed. The hare runs very quickly at the start. The tortoise travels 10 M every minute. the hare travels 2500 M in the first minute but, in each mi

### Sequences and series

I need direction on how to approach the sequencing and series of algebraic arithmetic. (See attached file for full problem description)

### Word problems

Please help me understand how to solve these 2 word problems: 1.) McMoRan projects that in 2010 world grain supply will be 1.8 trillion metric tons and the supply will be only 3/4 of world grain demand. What will world grain demand be in 2010? 2.) Before Ronald sold two female rabbits, half of his rabbits were femal

### Sequences and Series Word Problems : The first row of an auditorium has 13 seats. Each subsequent row has 11 more seats than the previous row. If the total seats in the auditorium is 1183, how many...

The first row of an auditorium has 13 seats. Each subsequent row has 11 more seats than the previous row. If the total seats in the auditorium is 1183, how many rows are there in the auditorium?

### Is a Sequence a Function? Aritmetic and Geometric Sequences; Real Life Examples of Sequences

Using the index of a sequence as the domain and the value of the sequence as the range, is a sequence a function? Include the following in your answer: Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the arithmetic sequence? Which one of the basic functions (linear, quadrati

### Formula for Measuring Sound and Loudness

The loudness of sound is based on intensity level measured in decibels using a logarithmic scale and is relative to (a ratio of) the weakest sound the ear can hear. How is sound measured? Can you also include the following items in your posting: - The formula for measuring sound. - Pick a specific sound, give the decibels

### Step-by-step solution using factoring

Result should be two X values Problem is: 3x(squared) = 16x +12

### SQ Root

For the equation x-the sq root of x=0, how do I solve for all values of x to satisfy the equation?

### Square roots

Can you show me how to solve the following equations? Square roots confuse me. Sq Root of X-1=3? Sq Root of X^3=8? and ^3sq root of x^2=4? Is the sq root of x^2=x an identity?

### Proving that two equations are equal

This is a question from a past exam paper for entrance onto a degree course. Whilst I am sure that the question is not that difficult, I do have real problems with this type of question. I am not sure how to get started with part (a) so could you please list every step as simply as possible when solving the problem. On part (

### Lowest Terms, Solving Equations Surface Area of a Sphere

Please see the attached file for the fully formatted problems.

### Linear Function of Distance and Time

How do I write a linear function showing distance traveled, d, as a function of time, t, ? I know the miles are 300 and the car is moving at a constant speed of 60mph. I know if you divide 300 by 60 the car will arrive at it's destination in 5 hours and at 3 hours it will have only traveled 180 miles. But how do I show this ?

### Simple and Compound Interest and Certificates of Deposit

Take the current amount you have in your checking or savings account. Suppose you have a choice of keeping your money for five years in a savings account with a 2% interest rate, or in a five year certificate of deposit with and interest rate of 4.5%. Calculate how much interest you would earn with each option over five years t

### Simple and Compound Interest

You have \$380,000 in your bank account. The interest rate in your account is 5%. Solve for the following: a. How much interest will you accumulate if interest is compounded annually over the next five years? b. How much interest will you earn in your account over the next five years with continuous compounding?

### Absolute Value Expressed as Word Problems

1. x is less than 7 units from 9 3. y is within 5 units of -2 4. s is non-positive and not less than -19 5. Find the distance between the numbers -1.387 and 2/9

### Converging sequence

I would like help on the following problem: Suppose {a_n} is a sequence that satisfies the condition lim n-> oo (a_n+1 - a_n)=0. Prove that the sequence {a_n / n} converges to 0.

### Fibonacci sequence

The problem is Take any of the generalizations about the Fibonacci Numbers that we have considered, and investigate what happens if the sequence is formed by two different starting numbers but continues in the same way by adding successive pairs of terms. For example, you might form a new pseudo-Fibonacci sequence in this w

### Area Word Problems : Effect of Changing Length and Width of a Square - Effect on Area

Sam lives on a lot that he thought was a square, 157 feet by 157 feet. When he had it surveyed, he discovered that one side was actually 2 feet longer than he thought and the other was actually 2 feet shorter than he thought. How much less area does he have than he thought he had?

### Substitution

(See attached file for full problem description) Could someone please help me with the problem and show me ALL the steps.

### Solve for X and Y : sqrt(6x+2y)-1=sqrt(7-2y)

Sqrt(6x+2y)-1=sqrt(7-2y)

### Simplify : (x-y)-z=x-(y-z)

Simplify (x-y)-z=x-(y-z)

### L'Hospital's Rule, Asymptotes, Global Extrema, Inflection Points

F(x) = x^2 e^(17x) 1. Find an equation for each horizontal asymptote to the graph of f. 2. Find an equation for each vertical asymptote to the graph of f. 3. Determine all critical numbers. 4. Determine the global maximum of the function. 5. Determine the global minimum of the function. 6. Find inflection points. 7. Fin

### Real and Non-Real Affine Intersection Points and Their Multiplicities

For the first 5 questions, consider the set of intersection points of two equations, and let a1 be the number of distinct affine real intersections with multiplicity one, let a2 be the number of distinct affine real intersections with multiplicity two, let b be the numberof distint complex non-real affine intersections and let

### Solving a Word Problem Subject to Constraints

Joe has to take a test which consists of short-answer questions worth 9 points each and essay questions worth 25 points each. He must do at least 9 short-answer questions, but won't have time to do more than 10. He has to answer at least 3 essay questions, but can't spend time to do more than 10. If no more than 19 questions can

### The absolute value of 1/2n +2 = the absolute value of 3/4n-2

The absolute value of 1/2n +2 = the absolute value of 3/4n-2, how do I solve when it isn't equal to anything but themselves?

### Solving Equations with Absolute Values : |b+7| +5=13

|b+7| +5=13 solve the equation. I am not sure how to do that some of the answers are {-1, 15} or I come up with {1}...I don't think I am doing this correctly.

### Application Word Problems : Mile Race

Sally runs 2 mph faster than Paul throughout a 10 mile race. If Sally finishes 25 minutes ahead of Paul, what was Sally's time for the race?

### 9 Math problems: Solve each proportion from pages

Page 371 & 372 Solve each proportion # 28. 9 3 --- = --- X 2 # 31. 5 3 --- = ---- 9 x # 39. a a + 3 ------ = -------- A + 1 a # 41. m - 1 m - 3 ----------- = ---------