Search 72,429 tutors
Ask a question

# Solve for base. Part ( after decrease) is 12,593, rate of decrease is 30%. The base is? (answer)

Piece of cake!  Remember that 30% off is seventy percent OF.  So, in other words, seventy percent of some number, the original number which you are looking for, is 12,593.  Now, let's convert the percent to a decimal and get:   0.7(x) = 12,593   Now, using...

# what is the % notation of 6.3 (answer)

630%.  Remember, to put it in percent notation, you multiply by 100.  Or, move the decimal two spaces to the left.  Kudos!

# 2x^2+4x-240 (answer)

Hello Lord, Well the first thing I'll factor out is 2.  Now it's 2(X2 + 2x - 120) Now I'm looking for two numbers that have a product of 120 and a DIFFERENCE of 2.  I say difference because remember, these two numbers are going to have to multiply to -120. ...

# Multiply (2x+4)^2. (answer)

It's 4x2 + 16x + 16

# Multiply (2x+4)^2. (answer)

Hey there.  Since you are squaring it, you multiply it by itself.  Thus it's: (2x + 4)(2x + 4) You need to FOIL it.  You know, First, Outside, Inside, Last: 4x2 + 8x + 8x + 16. Then combine like terms: 4x2 + 16x + 16. Shake a leg...

# I have a question in my algebra book that i need help figuring out! (answer)

Roman's answer is correct.  Assuming of course that (X - 6)(X + 3) = Y

# find the slope, if it exists, of the line containing the pair of points. (7,3) and (-8,3) (answer)

The correct answer is zero.

# How many whole numbers round to 1000? (answer)

Well that depends.  If you're rounding to the nearest ten, it would be ten:  (995 - 1004).  If you were rounding to the nearest hundred, there would be a hundred, to the nearest 1000 there would be a thousand.

# Can anyone solve this equation (answer)

Jimmy, Piece of cake!  First of all, divide each side of the equation by the common denominator of 2.  It makes it easier.  Now you have:  X2 -4x = 12.  Now you'll either factor it or use the quadratic formula.  Either way, you need to set it to zero.  So...

# Using the quadratic formula what does x = (answer)

Jimmy, The number of answers in infinite, as the value of X will depend on Y.  As an example, let's say Y were equal to 7 (just because).  If Y were equal to 7, I would therefore have: 7 = 4x2 + 6x - 2.  Now remember, the quadratic formula only works if the equation...

# how do i anser these (answer)

WAIT!!!  Tamara and Venkata are wrong.  Remember, division does not come before multiplication.  They are done at the same time.  The way you decide which to do first is by going from left to right.  If you have an equation written like this:  [75รท5(4-1)]x9 Then...

# Ax + By= Cz (answer)

So this is saying A to the X plus B to the y equals C to the z.  A, B, C, x, y, and z are all positive integers and and the latter three are all greater than 2.  Am I missing something here?  There's an endless number of answers.  Here's one, and it's a simple one:  Say...

# you are to design a handout that has dimensions 8 and 1/2 inches by 2 and 1/2 inches. the left margin is 1/2 inch and the space to the pictures is 2 and 1/2 inc (answer)

Hold it, hold it.  All they asked is how wide each picture can be to fit three across the page.  So let's give them exactly what they're asking.  The page is 8.5 inches wide, with 0.5 inch left margin.  That leaves 8 inches.  There is a 0.5-inch space between the three...

# 60 pounds of coffee and 90 pounds of coffee were bought for a total price of \$180 how much per pound is each coffee? (answer)

I love this problem because I've been to both of those countries.  Now, I'm going to write that 60G + 90N = 180 In the previous equation, the G stands for the price of Guatemalan coffee, per pound.  N, of course, is the same thing for Nicaraguan coffee.  Now I can use...

# how many candles and soap do i need to sell? (answer)

Okay, I'll answer this in parts. A.  C + 2S > 200 This is assuming that c is the number of candles that are sold at the fundraiser.  Remember, the profit on C and S is a dollar and two dollars, respectively.  Think about it;  1.75 - .75 and 3.25 - 1.25.  Since...

# On questions such as the area is 3 times the square root of 2 + 5, how would you solve that algebraically? (answer)

Here's what you do.  They say the AREA is 3 times the square root of 2 + 5.  I am assuming by 2 + 5 you mean 7.  If the number 5 is NOT in the radical, then this whole thing would be 5 + 3sqrt(2) but I interpreted that as 3(sqrt(7)). Now knowing that the area of this...

# find the distance between the points (-2,5) and (12,-1) (answer)

Dear Louis, You can figure out the precise distance between these two points by using what you know about right triangles:  that the sum of the squares of the legs equals the square of the hypotenuse. Here's how.  First, plot both of these points (-2, 5) and (12, -1) on a piece...

# The admission fee at an amusement park is \$2.00 for children and \$6.80 for adults. (answer)

Okay, here's how you figure this out:  you use what they call systems of equations.  We know that the the number of children plus the number of adults is 285.  After all, EVERYBODY is either an adult or a child.  We also know that 2 times the number of children plus 6.8 times...

# Trigonometry (answer)

Hello. Kevin S. In Seneca did an excellent job in figuring out that this equation can be factored and set equal to zero.  It can be factored into two binomials:  (4Sin(x) - 3)(Sin(x) - 1) = 0.  From here, it's a piece of cake.  You just set the factors to zero. ...

# What is the x-coordinate of the solution to the system x+y=5X-2y=-1 (answer)

Here is a quick way to solve it.  Remember (-1) is equal to (-1).  That's the reflexive property.  Though I always liked to call it the "no duh" property. But moving right along:  X + Y = 5x - 2y        ...we know this, now...