# Math

I need help with these problems. I've gone over the material a lot, and I just don't understand! Please help fast, test is tomorrow!

1. Factor 4m²+40m+100

2. The area of a circle is given by the equation A = ð(25x²+10x+1). Find an expression for the radius.

3. The bed of a pond can be modelled by 30 y= x²-15x+14 where x and y are measured by meters and the x-axis matches the water level of the pond. What is the width of the pond?

4. Find the term to create a perfect square trinomial: x² + 22x

5. Complete the square: r² - 4r - 7 = 0

6. The length of a rectangular swimming pool s x + 30, where x = width. It's area is 2800 square feet. Find the length and the width.

1. 👍 0
2. 👎 0
3. 👁 124

## Similar Questions

1. ### Reiny

Just a question for you. How do you remember all this. I'm wondering because I'm in precalc and I always seem to forget how to do the problems a couple weeks after the test. You seem to know everything without even hesitating.

asked by Dustin on January 11, 2015
2. ### English

I'm worried about my math. 1. Why don't you buy a math self- teaching book and solve math problems a lot. 2. Why don't you buy a math self-study book and solve math problems a lot. 3. Why don't you go to a math academy and study

asked by rfvv on March 4, 2016
3. ### ENGLISH

You'll be alert, engrosed in the (14)material.And concentrated 100 percent. a) no change b) material, and c) material; and d) material and After reading it over and over, I think b) a comma after material would be the correct

asked by nancy on August 5, 2010
4. ### Math

240 m of fencing material is going to be used to enclose three sides of a rectangular lot. What should the dimensions of the lot be so that the enclosed area is as large as possible? (I'm supposed to solve this using a quadratic

asked by Avery on August 22, 2010
5. ### Chemistry

Homework question? Colmanite [Ca2B6O11 * 5 H20] is a salt whose boron content gives glass high clarity. You are a buyer for an optical fiber manufacturer and want pure material. You have just received a Certificate of Analysis for

asked by Timmy on October 26, 2016
6. ### Algebra

A sports team is building a new stadium on a rectangular lot of land. If the lot measures 6x by 10x and the sports field will be 1x by 4x, how much of the lot will be left over to build bleachers on? 56x^2 64x^2 30x^2 60x^2 I just

asked by Cassie on February 19, 2013
7. ### MRP Operations Managment

On Hand is the quantity of the item that is on hand at the beginning of period 1. Lead time is the amount of time from when an order is placed to when it arrives. See page 278. Lot Size - LFL means lot-for-lot, we order material

asked by JJ on November 28, 2012
8. ### algebra

i have got a lot of math problems to do...if you can just help me with 3 of these problems...i could do the rest...thank you so much!! factor each expression::: 1. 20xy 2. 36g^2h^2 3. 44m^2n

asked by savannah on August 18, 2010
9. ### materials engineering, essay topics

I have to write a research paper and here is the topic. The paper should be on the use of a new or existing material in a new or unique way. It could also llok at a new or unique way of forming or processing a material. Basically,

asked by Anonymous on October 19, 2010
10. ### Project Management

. What tools and techniques are or could be utilized within your Company to identify project risks? What have been or would be the advantages? Risk is most often identified in delivery dates of material (and engineering services).

asked by Elaine on November 14, 2006
11. ### Algebra

Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it