Anneliese

Solve the following system of linear equations: 2x - 3y + 6z = -12 5x + 2y - 8z = 29 7x + 6y + 4z = 49 First, I did elimination for the first two equations. I multiplied the first equation by two, and the second equation by 3. 4x - 6y + 12z = -24 + 15x +...

16 years ago

Find all solutions to the following system of equations: x + 3y + 2z = 6 -3x + y + 5z = 29 -2x - 3y + z = 14 This just did not work out for me. Here is my work: I first solved Equation #1 for x. x = -3y - 2z + 6 Then, I did substitution, and replaced x fo...

16 years ago

In the magic square shown (I'll type it out), the sum of the numbers in each row, column, and diagonal are the same. Five of these numbers are represented by v,w,x,y, and z. Find y + z. Here's what the magic square looked like. I'll type semi-colons to se...

16 years ago

The function 5x^2+2x-1's domain is all real numbers, according to the answer key. However, I don't know how to factor this to prove it. Could you show me? The function the sq. root of y-10 has a domain of all numbers so that y is greater than or equal to...

15 years ago

I'm not sure how to find the domain for the 4th root of (1-x^2). Can you break down the process for me please?

15 years ago

f(2)=5 f(-2)=1, I have to write the linear function for this. I got 5-1/2- -2=4/4=1 then I plugged it in so it would be y-5=1(x+2) which became y=x+7, then f(x)=x+7. The answer key, however, says f(x)=x+3. What did I do wrong?

15 years ago

How can you tell an equation's real or imaginary roots just from its graph, without knowing the equation? I have to look ath the graph of a parabola, absolute value, and a negative third degree equation and do so? Are there any links that could explain th...

15 years ago

f(x)=2x-5 g(x)=2-x. I had to find f/g(x). I wrote 2x-5/2-x but this was marked incorrect. How would you do it then?

15 years ago

(f/g)(-1)-g(3) when f(x)=x^2+1 and g(x)=x-4. I got -1^2/1-4-(3-4), which became 2/-3 + 1. I multiplied the 1 by -3, which resulted in -3/-3 or 3/3. 2/-3+3/3 is 1/3. But my book says the answer is 3/5. Where did I go wrong?

15 years ago

I have to find the inverse function of f(x)=3-4x. I got y=3-x/4 for the function. I then have to plug it back into the function and verify that it is the inverse. So I wrote (3-4(3-x))/4. This resulted in (-3+x)/4=x. I tried isolating it to get x=x but I...

15 years ago

I am trying to figure out the zeroes of 2x^2-7x-30. I did this graphically in a way that matched up with the answers in my book, however, I couldn't get it by distributing. I tried (2x+-10)(x+3) but that didn't get -7x in the middle as logic told me it sh...

15 years ago

How do you find the zeroes of x/(9x^2-4)? I thought the answer would be the sq. root of 4/9, but my book says the answer is zero. Why is this?

15 years ago

I had to find the zeroes of (2t-3)/(t+5). I thought one of the answers could be -5, in addition to 3/2. But my book says -5 isn't an answer. Why?

15 years ago

How do you find the zeroes of the 1/2x^3-x? I factoried it so it would be 1/2x(x^2)-x. The one zero would then be zero, which matches with my book's answer. But I have no idea how my book got +/- the sq. root of two for the other one. Can you demonstrate,...

15 years ago

9.6*10^2/3.2*10^5 please evaluate this expression and show answer in both scientific notation and in standard form. Thank you so much for helping me.

8 years ago

Please show me the correct way to simplify this expression: (4t)^-2 t^0/ t^6 v^- Thank you so much.

8 years ago

I previously made a mistake by leaving out an exponent from this expression;Steve wisely pointed out the error.Thank you. Will you please simplify the corrected problem. (4t)^-2 t^0/t^6 v^-8 Thank you so much.I'll be more careful in the future.

8 years ago

Please show me how to simplify: (p^2+4p-23)-(3p^2-23p-23) Thank you so much.

8 years ago

Will you please show me how to completely factor this expression 2a^2c^3-14bc^3+32c^3d^2 Thank you very much for your help.

8 years ago

Would you show me how to completely factor each of the following expressions. t^2 + 4tv + 4v^2 z^2 + 11z -42 Thank you for your help.

8 years ago

Please completely factor this expression. 5c^2 -24cd -5d^2 Thank you!

8 years ago

How do I completely factor this expression? 256z^2 -4 -192z^2 +3 I appreciate your help.

8 years ago

Please completely factor the expression: 3j^3 -51j^2 + 210j I greatly appreciate your help.

8 years ago

Please check my system of linear equations using any algebraic method. Show the check,if possible. 8x-6y=12 / 12x-9y=18 8x-6y=12 (eq.1) 12x-9y=18 (eq.2) 4x-3y=6 (eq.1) 4x-3y=6 (eq.2) y=4x-6 / 3 Check: Thank you for your help.

8 years ago

Graph the system of inequalities (shade each half-plane solution,not only the overall solution). y<= 3/2x+3 2x + y<10 y>-1

8 years ago

Please COMPLETELY factor this expression. t^2 + 4tv + 4v^2 Thank you for helping me.

8 years ago

Please show me how to COMPLETELY factor this expression. z^2 + 11z -42 I appreciate your generous help,thank you.

8 years ago

A bird sitting 16 feet above the ground in an apple tree dislodges an apple.After how many seconds does the apple land on the ground? (assume no branches interfere with its fall.) Thank you.

8 years ago

Completely factor : w^2 - 15w + 54 Thank you.

8 years ago

Completely factor : 45g^2 + 12g -9 Thank you

8 years ago

Completely factor: 3j^3 -51j^2 +210j Thank you very much.

8 years ago

please show this exact problem completely factored: w^2 -15w +54 . I appreciate your help.

8 years ago

Solve by completing the square;round to the nearest hundredth if necessary. x^2-3x=4 Thanks so much.

8 years ago

Can someone help me solve this story problem? Tom is buying a 42 inch 1080 television on sale for 40% off. If the aspect ratio is 16:9 and the frame around the screen is 1 inch wide,will it fit in an entertainment center with an opening that is 36 inches...

8 years ago

Y=X^2 -4x -32. Use this function and determine whether the parabola opens up or down; explain your conclusion. Thank you.

8 years ago

y=x^2 -4x -32. Use this function and identify the axis of symmetry and the vertex. Thank you.

8 years ago

Y=X^2 -4x -32. Use this function and identify the minimum. Thank you very much.

8 years ago

Please simplify using long division (showing all work) : (8b^3 -6) / (2b-1). Thank you.

8 years ago

Please simplify this expression,if possible. State the excluded values,if any. 5x-5 / 10x^2 -25x + 15. thank you for your time.

8 years ago

Please show me how to simplify this expression and solve the equation: (v^2 + 6v+8)/(v^2 + v - 12) / (v+2)/(2v-6) Thank you very much.

8 years ago

Please show solution to this problem. In triangle A, the longer leg is 6 more than the shorter leg and the hypotenuse is 6 more than the longer leg. Find the lengths of each side of this right triangle. Show all calculations. Short leg = _______ Long leg...

8 years ago

One more triangle question,please. In this triangle,the short leg is x and the longer leg is 1/2x + 11. If the hypotenuse is 2x + 1, what are the lengths of each side of this right triangle? Please show all calculations. Short leg = ______ Long leg = ____...

8 years ago

Please show me how to completely factor the following expression: 5c^2-24cd-5d^2 Thank you

8 years ago

Eye color is determined by genetic combinations.There are 4 possible genetic combinations: RR=Brown,RL=Brown,LR=Brown,LL=Blue.Show a 4 square Punnett square that models these conclusions. Thank you.I hope someone can show me the solution.

8 years ago

Please solve the following problem by using factoring and the zero-product property. 9r^2-30r+21=-4 Thanks

8 years ago

Please, Completely factor 5c^2-24cd-5d^2 Thank so much

8 years ago

If eye color is determined by 4 possible genetic combinations,RR-Brown/RL-Brown/LR-Brown/LL-Blue,what percent of the possible genetic combinations are carriers for the Blue-eyed offspring?

8 years ago

Find the lengths of each side of this triangle. Show calculations. Short arm=X; Long arm=1/2X+11; Hypotenuse=2X+1. Thanks a lot for your help.

8 years ago

To completely factor 5c^2-24cd-5d^2, I used the following steps: (5c d)(c 5d) to give terms,ignoring signs,5c^2,cd,25cd,5d^2. +cd-25cd. (5c+d)(c-5d) Please correct,if necessary,and show correct way to show this problem. Thank You.

8 years ago

Please check my work and correct if necessary. Thank You. Using factoring and zero-product property, this is my solution for 9^2-30r+21=-4. 9r^2-30r+21=-4 9r^2-30r+25=0 (3r-5)(3r-5)=0 r=5/3

8 years ago

Please correct,if necessary, and simplify using long division: (-72-4x^2+8x^3-36x) devided by (x-3). My solution: 8x^2+20x+24 ------------------- 8x^3-4x^2-36x-72 8x^3-24x^2 ------------------ 20x^2-36x-72 20x^2-60x ----------------------- 24x-72 24x-72 -...

8 years ago

Please correct my work. Using long division,simplify (8b^3-6),devided by (2b-1) My solution is: 4b^2+2b+1 ---------------- 8b^3 -6 8b^3-4b^2 ----------------- 4b^2-6 4b^2-2b ------------------ 2b-6 2b-1 ------------------- -5

8 years ago

Please simplify the expression and solve the equation.Thank You. v^2+6v+8,/v^2+v-12, devided by v+2/2v-6

8 years ago

Will someone please check my answer: If R is the gene for brown eyes,and L is the gene for blue eyes, consider the children of a parent with a homozygous brown-eyed,RR,gene combination and a parent with a homozygous brown-eyed,RL,gene combination. What pe...

8 years ago

Use factoring and zero-product property to solve: x^2-x-2=4 Thanks.

8 years ago

please check and complete this problem using factoring and zero-product property: x^2-x-2=4 x^2-x-6=0 -3+2=-6 -3+2=-1 (x-3)(x+2=0 so either x-3=0 or ?

8 years ago

I am baffled! Find the equation in slope-intercept form of the line that is the perpendicular bisector of the segment between (-3,2) and (3,-8); also,please name which formulas are used. Thank you!

8 years ago

It takes 7 hours for Isabella to rake leaves by herself.Her brother can work 3 times as fast.if they work together,how long will its take them to rake leaves? My answer: Isabella can do one job in 7 hours (1/7in one hour).Matthew does 3/4 of the job in on...

8 years ago

Will someone please simplify and clearly define the terms "Rate," "Time," and "Work done," as it relates to the work done by one or more persons. Thank you so much!

8 years ago

Uggh... I am doing the same thing right now, and not fully understanding either, but I'll try to explain. What I was told is to solve the first equation for x or another variable. In this case, it would be easier to do z because it doesn't have a number n...

16 years ago

I finished it up like I said with elimination and got y = -3. Is this correct? If not, I'll try it the way you suggested with elimination the whole way through. Thanks, Liese

16 years ago

Could you define the context of "risks" and "injury"? Is this for a unit on drugs, athletic injury, or just decisions in general?

15 years ago

First, look in the dictionary and make sure you understand the definition of lobbying, or use the glossary in your book. Then, think of who might lobby and why they might do so. Write the result on here and I'll give you my opinion.

15 years ago

Think of what appliances, electronics, and utilities require energy. You can do this just by looking around your house and seeing what has a plug. Then, think of the consequences of what would happen if these things are always running. Who would get affec...

15 years ago

36*4= 144 144/9=16 X= 16 peices

13 years ago