# Math grd12

4,660 results, page 19
1. ## Algebra

Explain how to use mental math to simplify the expression. a.) 8 * 3 * 2 b.) 8 * 2 + 3 c.) 5 + 8 + 3 d.) 10 * 3 -4 I have to include what properties (associative, distributive etc.) I used to simplify the problems.

asked by Anon on May 28, 2015
2. ## Algebra

Help, lost with the second part of this: Evaluate the expression: If y=100 and z=200, what is the value 2y + 2z -100 Ok, maybe I have done too many math lessons in one day, but wwhhaatt????? Thanks

asked by Jelleybean22 on September 20, 2018
3. ## mat115

can someone help me with this math question. I am asked to show my work but I don't know how to do so. The question is: The following set of numbers a perfect triple? 8, 10, 12 yes or now and how so? Thanks for your help.

4. ## Math

Find the approximate area of each circle. Use the value of pi that makes the math the simplest for you. In the example, it's a circle with 14cm written on it in the middle. I'm

asked by Kimm on April 30, 2015
5. ## Math!!!

I have an MSA math question. What scale would you use for making a frequency table of the following data 21,79,11,9,55,38,111, and 92? Please answer it I need the question now.

asked by Somebody on September 6, 2011
6. ## Mathematics

By the way, I'm really bad at math, so I'm probably wrong here. Put these decimals in order from least to greatest. 7.0, 0.07, 0.7, 0.077 my answer: 0.077, 0.07, 0, 7, 7.0 Am I close?

asked by M on September 28, 2018
7. ## chemistry-buffer

if you added 4ml NaOH 1M to your 100ml 0.1M buffer, would it still be a usable buffer according to our convention? Explain why or why not(math would be good at here)

asked by yy on November 7, 2016
8. ## multiplying fractions

write a word problem for 1/3 x 1/4 use the definition of multiplication and math drawing to help determine the answer. explain you answer.

9. ## Math

How do you find the perimeter on a on a what????? what is "integer" in math terms for example 15 steps behind directions say "write an integer to represent each situation"

asked by Jordan on March 29, 2007
10. ## math

I know it seems strange, but for our homework tonight in math class, our teacher had us list 10 things to say instead of "shut up." I only have a couple, and need some help, please list as many as possible, thanks so much!!

asked by Jen on September 2, 2009
11. ## physical science

im sorry but im notiing others are gettin help before me with math, algebra, and i honestly think its being done on purpose..just because i keep asking.im justy worried about my test that is coming up..i honestly need help

asked by 45843 on July 19, 2011
12. ## TI 84 Plus

How do i get to the regression equation on the ti84 plus calculator. I am working on a math problem trying to view my equation once i plugged in the data

asked by bria on July 13, 2012
13. ## math

Which option best explains the sentence below in math terms? The Earth is covered by 30 percent land and 70 percent water.

asked by Anonymous on January 11, 2013
14. ## Math

I am a parent of a seventh grader enrolled in k12 and neither of us are doing so great in the math department. is there a way to get the answer key for k12

asked by k12 on May 20, 2014
15. ## Math

In math, negative minus negative equals what? Ex: -38-(-14) Please list all the other rules of multiplying, dividing, adding, and subtracting!! Thank you!!

asked by King Bla on June 3, 2014
16. ## Math

If the 15th and 16th term of an arithmetic sequence are 99 and 92 respectively then the 5th term is? Studying for math final and I cannot figure this out

asked by chris on January 16, 2017
17. ## math

how would I solve 10=7-m? I don't understand how to find the variable and I use flowchart!none of my math books show me how! so how can I solve problems like these?

asked by Emi on January 11, 2013
18. ## math

Lucas' last 4 test scores were 88, 95, 92 and 81. 90% or better is an A. What would he have to get on his fifth math test to pull up his grade to a 90?

asked by tina on October 27, 2015
19. ## math

if i bought a car for \$18,500 and price was 35% off what was original price and how do I do the math

asked by ray on August 17, 2011
20. ## Middle Math

My math calculator prompted me with this question 6E-7. My answer to this question is 0.00000007

asked by Tammy on March 30, 2015
21. ## math

if i bought a car for \$18,500 and price was 35% off what was original price and how do I do the math

asked by ray on August 17, 2011
22. ## Maths

So if I'm using the area 8558.25 in that math I need to have it as 8558.25squared and then sqaure root it?

asked by Tatiana on April 24, 2011

explain how you can find the difference 120-70 using mental math. then name the difference

asked by blaine on August 23, 2010
24. ## math

jennifer must complete any 10 of the 25 math problems on a test what percent must she complete

asked by nylla on May 20, 2018
25. ## substitution method

I am burned out on math or just confused. 3x + 7y=10 x= 2-2y A. Solution is an ordered pair B. No solution

asked by Lorri on July 9, 2010
26. ## Math

Hello, Can someone help me with my math problem? Does |k – n| = |k| – |n| for all integers k and n? If so, give 3 examples.If not, give a counterexample.

asked by hannah on February 25, 2010
27. ## Pre-Calculus

Hi! I'm having trouble with this math question; can someone help? Thanks! :) Given the function f(x)=x^2+9, solve. a.) Find f(-3) b.) Find f(x-2)

asked by Tiffany on September 16, 2014
28. ## English

1. He has studied math for three hours. 2. He has been studying for three hours. ---------------- Are both grammatical? Which one is commonly used?

asked by rfvv on July 8, 2014
29. ## math

Surface Area: 4r^2 41.25^2 S.A= 19.6 inches^2 Volume: 4/3r^3 4/3 1.25^3 V=8.2 inches^3 could someone check my math?

asked by . on February 15, 2018
30. ## math

i am wondering if the following answer to my math problem is correct f(x)=x^3-4x-2 [2,3] the answer i put was f(200

asked by rudy on January 24, 2008
31. ## Math

Math: d is partly constant and partly varies with v when V=40 d=150 and when v=54 d=192

asked by Folajimi on October 29, 2018
32. ## Math

Does anyone know the answer to the math riddle "Did you hear about..." the answer is 12 words and it's pg 167.

33. ## Math

Okay. So i am getting frusterated I was given a math sheet. On it has the anwsers. I have tried to get my answer to match up, but I can't get it. COuld somebody please help me? 10-(2y-6)-y y is 8 *The answer is -8.* Thanks!!

asked by Dawn on February 25, 2009
34. ## Math

Robert took a math test and got 36 out of 50 correct. What is the percentage of correct answers?

asked by Connor on February 1, 2016
35. ## math

In my math book i got a question 1 1/3 times 1/4 my answer was 5/12. I know the answer is right but how do i do the problem

asked by Americal on June 27, 2012
36. ## algebra

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that?

asked by katelyn on October 19, 2011
37. ## math

My brother George needs help with a math question. What percent is 23 students of 51 students?

asked by Mattie on October 30, 2008
38. ## algebra/common math

how do I solve this? I know it's common math, but I cannot remember how! -4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!

asked by bob on March 28, 2010
39. ## math

I'm having problems with subtracting 10 digit math problems.Can you give me any websites?

asked by Nehemiah on September 2, 2008
40. ## math

how do I solve this? I know it's common math, but I cannot remember how! -4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!

asked by bob on March 28, 2010
41. ## Math

My Math Problem is {4/5n + 9/2} = 49/10 8/10 45/10n = 53/10n 53/10 x 49/10 = 490/530 n= 60 am I correct

asked by Americal on October 2, 2015
42. ## math

Hi, Im having trouble with this math equation.. if you can, can you please help me and explain. the equation is : 3/7d=5/4 You have to find the solution. Thank you

asked by Bethany on February 19, 2015
43. ## Math

Ok we are doing distributive property in math and I'm so confused on some of the problems. the problems are: 9+(x-4) 5-4x-5/-4 4(3x-2y)-3(4x-3y) 7(r+s)-(r-s) 3y-2(x-2y) Thank you so much for your help. Ellie

asked by Ellie on November 23, 2008
44. ## Math #2

If I had a math problem 2x^4 x y^-4 x z^-3 / 3x^2 x y^-3 x z^4. In simpler terms it would look like this: 2x^4 X y^-4 X z^-3 ------------------- 3x^2 X y^-3 X z^4 When I tried to solve this I got 6x^2 X y^-1 X 2^-7. Am I correct? If not could you please

asked by Nicole on November 26, 2013
45. ## Math

When you have a 76% in math and you need to get your grade up to a b and daily assignments are 10% and quizzes are 80%. How will I get my grade up to a b in 5 weeks

asked by Lola on August 26, 2016
46. ## to mRS.SUE

BUT I DON'T UNDERDSTAND HOW YOU EXPLAIN IT!SO FOR MATH,THE ANSWER IS 20?HOW DID YOU GET THAT ANSWER?I NEED AN EXPLANATION!

asked by Celest on February 22, 2012
47. ## Math/history

I have to do a project and need info. about mean, median, mode, range, freqency tables line plots, and stem and leaf plots. I would like historical facts like how, who, where and why these methods came to be. I want to get a good grade so I am willing to

asked by elizabeth on October 21, 2006
48. ## Math

I have 4 math problems that need to be solved by using factoring. I am unable to figure the following out. I have used the FOIL method but it seems not to be working out. I appreciate any help I can get. Thanks ^ exponet 3x^3-7x^2+2x x^2-2x+5

asked by Mary on April 7, 2007
49. ## Math

Assume that math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. A score of 560 reprecents what percentile? Please round answer to the neareast tenth.

asked by Deb on December 11, 2010
50. ## Math

A teacher made a pair of foam dice to use in math games. Each cube measured 10inches on a side. How many square inches of fabric were needed to cover the two cubes?

asked by Brandy on February 16, 2017
51. ## Math

6th grade math book #2 pg. 438: 17. Suppose the population of the United States is about 230 billion. Is this number closer to 10 to the seventh or 10 to the eighth? Explain your reasoning.

asked by Ginevra on November 30, 2017
52. ## English writing

From earlier I posted a question on how to write a thesis from the topic What is your favorite piece of furniture?Explain. When I sit in my recliner chair it helps me to solve math problems.

asked by Ak on August 18, 2008
53. ## algebra

I sent a math equation to be solved because i am comfused on what to do with the whole numbers and I got one reply that is not correct. Here it is again. Simplify. Assume no denominator is equal to zero. -10m-1y0r _______________its a fraction set up.

asked by trista on January 21, 2010
54. ## Subjects

Will i get a lot of homework in middle skoo ????? here r my classes Math F.A.C.S. Art Sci English Content Support 7c Gym Social Studies also if i did what to do ???? need tips ???? plzzz answer

asked by Jenny on September 5, 2011
55. ## Math 221

Math 221 - Ms. Sue, Sunday, July 13, 2014 at 2:24pm I've done several problems for you. Now it's your turn. How do you think this problem should be solved? Answer this Question I was thinking that I should multiply the numerators and denominators

asked by Erica on July 13, 2014
56. ## math %

I hate math,It is hard no matter how I study.What is 30% of \$1742.00? If possible I am having problem with a school that keeps the disbersement.I need to learn about how to understand it to know if I been cheated out of money.Online courses in fafas,lender

asked by tris on September 4, 2010
57. ## satistics

Assume that the math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. If you score 560 on this exam, what percentage of those taking the test scored below you? semperfi

asked by bryan on March 12, 2015
58. ## Math, Science, Sociology, Economics

Math: What is the answer to 1146(150+X)+8911(743+19X) Science: What is photosynthesis? Sociology: What is figuration and functionalism? Economics: What is Opportunity cost? Why is it relevant to life?

asked by Shaan on August 27, 2014

USE MENTAL MATH TO ADD OR SUBSTRACT: 1. 80+79+20 2. 308+95+5 3. 480+255+20 4.365+289 5. 523-198 6. 537+180 7. 325+239+75 8. 87+38+62 9. 4500-280

asked by MONA on September 21, 2009
60. ## math

This week’s focus is on systems of equations. Describe a profession that might use this on a regular basis, and give an example with a solution (not covered in the text) of a math problem with a real-life application.

asked by Leo on February 10, 2012
61. ## Math

My math homework question stated : Jaske completed a marathon race in 3 hours and 12 minutes. Write Jakes running time as a decimal. Am I correct. Thanks Answer 3.12

asked by AMERICAL on October 1, 2013
62. ## Calculus

A point P in the first quadrant lies on the parabola y=x^2. Express the coordinates of P as functions of the angle of inclination of the line joining p to the origin. I honestly don't think my math teacher explained this at all. Please help. Thank you very

asked by JEUCD 12311 on December 3, 2011
63. ## Gen Chem II

Thanks for the information Dr. Bob. Would you be able to work it out so that I can actually see the steps with the numbers and follow from there. The question was on Vitamin K from Sunday at 2:44pm which you answered at 3:45pm. Thanks again. I am looking

asked by Nefret on February 11, 2013
64. ## science

Which of these energies might correspond to the KE of a person riding a bicycle on a road? 10 J; 1 kJ; 100kJ KE is 1/2 mv^2. Take your mass (weight in lbs/2.2), divide by two, take a typical speed say 10mi/hr or 6.6km/hr or 5m/s, square it, and do the

asked by tasha on February 19, 2007
65. ## Math

Which graph represents the solution to the given system? Y=-x+2 Y=1/2x+8 (I cannot copy and paste the graphs here, but if anyone knows it, for 7th grade math on Connexus, the Systems Of Equations And Inequalities Unit Test, maybe you can help. My answer is

asked by Me on January 11, 2019
66. ## science

Research suggests that American students lack a sufficient education in math and science to compete globally. How does the controversy about teaching evolution affect and reflect this problem?

asked by cooksthe1 on December 29, 2014
67. ## Foundations and Pre-Calculus Math 10

Find the radius of a cone with a height of 3m and a volume of 30m cubed. So far I have 90m cubed / 3m = pi(r^)3m/3m. Then I get stuck. Help! I'm really bad at math. ):

asked by Amber on October 14, 2014
68. ## Math-Algebra 1

I need help with a pizzaz work sheet ASAP if i don't get this done i am on the verge of failing math and repeating 9th grade. its Pizzaz 11.10 thanks

asked by Brandon S. on June 12, 2011
69. ## Algebra

Explain how to use mental math to simplify the expression. a.) 8 * 3 * 2 b.) 8 * 2 + 3 c.) 5 + 8 + 3 d.) 10 * 3 -4 I have to explain the process. Example: Using the associative property of multiplication I can group 8*(3*2) so I get 8*6. Then I multiply

asked by Anon on May 28, 2015
70. ## math

How do you find square roots? http://mathforum.org/dr.math/faq/faq.sqrt.by.hand.html

asked by Chaz on October 28, 2006

Math I am a fraction in simplest form. I am greater than1/3 and less than 1/2. The sum of all my digitsb is 8. the difference between my numerator and denominator is 7. What fraction am I?

asked by maria on September 30, 2010
72. ## Algebra

Solve the inequality and express the solution in terms of intervals whenever possible. | x+3 | < 0.01 I know the answer is : (-3.01,-2.99) Please show me how to solve this type of math problem.

asked by Alex on August 12, 2012
73. ## URGENT: Grade 8 Math

In my math question it says: Multiply. Simplify before multiplying. Use benchmarks to estimate to check the product is resonable. a)3/4 x 8/5 is one of the equations What are benchmarks?

asked by Molly on September 25, 2009
74. ## Statistics

A math department is allowed to tenure 4 of 17 eligible instructors. In how many ways can the selection for tenure be made? Please show more than one approach.

asked by tamar on November 17, 2017
75. ## math

Multiply fractions and whole numbers 3. Math class starts at 9:50 A.M. and ends at 10:45 A.M. How long is the class??? Please help me on this question I'm stuck on homework!

asked by maraya on March 28, 2016
76. ## health

what education is required for dentist? Do i put answer like math, science what certain certificate do you need for this job? Do i put Bachelor's Degree?

asked by miyabi on January 19, 2016

Math i have 7 ten rods and 3 units squares. i am playing Win A Flat, i rolled a 9. how many ten rodes do i have after the exchanges?

asked by mike on October 14, 2009
78. ## algebra

Mrs. Little creates a boxplot for the test scores on her latest math test. She finds that the interquartile range is 20 points. What does this mean?

asked by Lila on May 3, 2017
79. ## 12 math

a library shelf contains 7 books. in how many ways can they be arranged if there are no restrictions? b. the mathamatics text book must be first. c.the 3 math text boooks must be together

asked by lindas on August 29, 2008
80. ## math

Write a number sentence. Use every digit in the circle only once. Insert math symbols ( + ,-,x,/) and end the number with 3. Us parentheses if necessary. The numbers are 10,7,6,4,5

asked by dummy on February 11, 2010
81. ## Arithmetic

32 is 40% of what number? I am brushing up on math that I haven't done in years. Could someone please explain this step-by-step to remind me how to do this kind of problem properly? Thank you!

asked by beautitudinem on May 22, 2017
82. ## Math

tom is scheduling his classes for next quarter. he wants to take three classes, and has the following options: spanish at 9, 10, or 11; music at 9 or 11; math at 10 or 12. list possible schedules he would choose

asked by bryan on March 10, 2015
83. ## math

Mrs. Little creates a boxplot for the test scores on her latest math test. She finds that the interquartile range is 20 points. What does this mean?

asked by tarvey on May 17, 2013
84. ## Math

Math question: My plane arrived in Chicago 45 minutes later from Detroit. How fast was my plane which traveled at about 20000 altitude?

asked by Lisa on September 23, 2016
85. ## Math

Need help! this is out of my math book. max had 192 apples. kyle had 409 apples. If abby adds them together then divides them by 3 what would it be? also adding onto that is 95?

asked by Carly on December 12, 2008
86. ## math

The teacher's pet team has 50 points in math fever. They miss a question worth 200 points. What is the new score?

87. ## math

please help me with my math. Use the distance formula to find the distance between the following points. Show all your work. Round to the hundredths place. (4,5) and (7,3) (2.4,8) and 1,6.3) (29,4.1) and (53.2, 100)

asked by logan on October 19, 2008
88. ## math

My math teacher gave me this problem: Prove the validity of cross products by example/words. (Why does it work as a strategy?) What is validity???

asked by Anya on November 16, 2009
89. ## arithmetic

On one of the questions of a recent math test, a student divided by 9 instead of multiplying by nine. This computation gave an answer of 18. What's the correct answer?

asked by Tom on December 8, 2009
90. ## algebra

can someone show me how to solve this the instructions are for me to solve by the quadriatic formula is this really 8 grade math im confused im trying to help my daughter tammi and i have never run across this before X^2 + 9=0

asked by tammi on October 7, 2013
91. ## Math Repost for Al

math - al, Tuesday, October 16, 2007 at 7:03pm ugh can u answer this for me...................... a car gets 20 mi/gal. how many gallons would a car need to travel 70 ,i?

asked by Ms. Sue on October 16, 2007
92. ## statistics-math

The mean score on a Math exam was 50% and the standard deviation was 10%. Assume the results were normally distributed. (a) What percent of students earned a score between 50% and 70%? ( /2)

asked by Noelle on November 9, 2011
93. ## algebra

Need mathamatical expression. The simple interest rate, given that the principal is 3x, the rate is 6%, and the time is 1 year. im so lost with this math question.

asked by Peggy on August 14, 2010
94. ## 100th day of school work

If you made a stack of nickels 100 inches tall, how many nickels will you need????????????? ARRRRRRRR! Math is soooo hard! Especially without a calculator!

asked by Kathleen on February 14, 2018
95. ## Math

Parametrically represent a Mobius strip. Since I am very unfamiliar with this topic, Math jargon should appear as little as possible and please provide step by step working.

asked by Yu on July 9, 2014
96. ## Math

Question: x/15=3 My answer: 45 Am I correct? Did I make a mistake? I've been having problems with math recently, so I wont be surprised if I made a mistake.

asked by Cassidy on January 27, 2018
97. ## Math

students can improve their math performance by putting forth additional effect when necessary. True or false I think it's True correct me if I'm wrong

98. ## math

How do i show work for this math question. A puppet requires 3/4 yard of material. How many puppets can be made from 9 yards of material?

asked by jack on October 4, 2010
99. ## math

Why do my numbers scramble when I post math homework into my classroom forum posting box when I click on post message?

asked by catherine on February 29, 2012
100. ## math

The math problem we need help with is: lbs of can collected by 4 children were as follows: #1 49 #2 72 #3 108 #4 121. the answer is 10. what is the question. where do i start to figure out what the question is their looking for?

asked by andrew on March 17, 2009