# Math(Please help)

4,634 results, page 28-
## writeacher

because in the previous message about the pemdas it is parenthesis,exponents,multiplication,division,addition,subtraction therefore how that little part that looks like this 12 divided by 2*2 it would be multiplication first then SORRY THEN DIVISION SO

*asked by jasmine20 on February 13, 2007* -
## math

How do you rotate an object in a graph?? It depends on what point you are rotating the plot. The math is somewhat advanced, so I don't know your level. i just need to rotate it..like 180 and 90.... Ok, rotating about the origin. For ninety degrees, counter

*asked by ....help on May 17, 2007* -
## Math-Probability

This is another one I need help with. On a TV game show, the contestant is asked to select a door an then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability, what is the expected value of the selection

*asked by C.J on January 23, 2010* -
## 11th grade

I REALLY need help on math because I can't understand what my teacher is saying in class. Here's the question : Sixteen metres of fencing are available to enclose a rectangular garden. a) represent the area of the garden as a function of the legnth of one

*asked by BoAFan on September 22, 2009* -
## math

Dr needs 500 needles priced at 2.60 per hundred. If he pays within 10 days, she receives a 2% discount, sales tax 5.5%. What amount would you pay with the discount? My math 2.60 x 500 needles = $13.00 $13.00 x 5.5% = 72cents 13.00 + .72 = $13.72 $13.72 -

*asked by LASTDAYS on May 13, 2010* -
## math

compound interest compute the compound interest on 1)Rs 1500 for 2years at 6% per annum. please send answer This site explains compound interest and shows the formula for solving your problem. http://math.about.com/library/weekly/aa042002a.htm

*asked by lalith on August 16, 2007* -
## Math

HELLO, THIS IS MY FIRST TIME USEING THE JISKHA WEBSITE. I NEED HELP WITH MY HOMEWORK. PLEASE HELP ME WITH MY HOMEWORK! THANK YOU! _______________________________________ MY MATH HOMEWORK: 30 DIVIDED BY 10 56 DIVIDED BY 6 55 DIVIDED BY 10 30/10=3 55/10=5.5

*asked by Sanjana on December 23, 2006* -
## English

1. Do you sleep less than 5 hours a day? 2. I like you less than him. 3. I ate fish less than fruit. 4. I ordered fried chicken less than noodles. 5. I player soccer less than baseball. 6. I studied math less than English. 7. I helped Mother less than my

*asked by rfvv on May 21, 2014* -
## algebra 2

how do you solve quadratic equations by finding square roots i have no clue how to do this. I have fallen behind in my math class because my teacher is horrible. I need to learn this to understand everything in the section in the section. I beg someboody

*asked by HELP ME on November 30, 2009* -
## math

Land growing continuous grain corn as a cash crop loses soil at a rate of 14.0 metric tonnes ha-1 yr-1. This is a fertile soil, which has an organic matter content of 3.8% and nitrogen content of 0.35% (both by mass). a)Calculate how long it will take to

*asked by Ramya= bobpursley help! please on November 12, 2009* -
## Math

Pedro spent 2 1/5 hours on his math himework and half as lomg on his science homework one weekend. If his english and social studies homework took 7/8 as long, how much time did he spent on homework that weekend?

*asked by Anthony on November 4, 2016* -
## math

Eli's Dad made him a birthday cake, but forgot to buy candles. He could only find a few. But Eli was smart in math, so his Dad said,"The ratio of candles to years is 3 to 5." That gave him the right number. How old was Eli?

*asked by Tyree on October 30, 2017* -
## Statistics

In a certain Math class, the probabilities have been empirically determined for various numbers of absentees on any given day. These values are shown in the table below. Find the expected number of absentees in a given day. Number of absentees, x 0 1 2 3 4

*asked by Joan on April 20, 2016* -
## Probability

Suppose a math class contains 46 students, 22 females (six of whom speak French) and 24 males (three of whom speak French). Compute the probability that a randomly selected student speaks French, given that the student is male.

*asked by Daniel Dash on October 9, 2016* -
## 3rd grade math

Carl shades a row on a multiplication table. The products in the row are all even. The ones digits in the products repeat 0,4,8,2,6. What row does Carl shade? Now I am awful at math and don't even begin to understand this question!! Please help

*asked by Mel D on November 19, 2014* -
## Math

On an automobile assembly line, every third car is green. Every fourth car is a convertible. a) How many cars are out of the first 100 will be convertibles? b) Which number of car is First Green convertibles? Grade 7 Math Please answer, ASAP.

*asked by Vince on September 8, 2016* -
## SHANNON

Suppose a math class contains 31 students, 14 females (four of whom speak French) and 17 males (two of whom speak French). Compute the probability that a randomly selected student is female, given that the student speaks French.

*asked by Anonymous on December 14, 2016* -
## math

1( which number is the solution for m + 90 = 150 A( 50 B( 60 C( 140 D( 240 2(which number is the solution of n/3 = -12 A( -36 B( -4 C( 4 D( 36 3( use mental math to find the solution of 19b = 190 A(10 B(11 C(171 D(280 4(estimate the solution of y + 1.8 =

*asked by cross fire on October 28, 2015* -
## math ( help)

Gli bought 9 cds.some of them cost $12.75, and the rest cost $11.95. the total was $112.35. how many did he buy at each price? Let E be the expensive, and C the cheaper. E+C=9 E(12.75) + C (11.95)=112.35 the answer to your math problem is 6 cds for 12.75

*asked by Graciela on November 2, 2006* -
## Chemistry

How do I find out I would evaporate all solvent ( dichloromethane) from mixture with water? I have less than 1500 ppm of dichloromethane in water and want to be sure if I evaporate all that stuff at 160 degrees? I got the feeling that iw would evaporate

*asked by Luke on February 3, 2012* -
## math

A book publisher is shipping a new book in boxes of 200. If 30 boxes fit in 1 shipping crate, how many books are in 20 shipping crates? Explain the mental math you used to solve the problem.

*asked by Deshawn on September 2, 2014* -
## 4th grade

math worksheet named Calculating Codes we are to fill in the correct signs (+ - X etc..) looks like we can't rearragne or create an order of operations other than the order of the signs. the example is 1 2-3+4 5 = 54 1 2 3 4 5 = 60 only need two signs +

*asked by Mom and daughter need help on November 12, 2009* -
## Math

Yes, it is I again, with yet another math problem. The question is; In a bag, there are 8 white marbles, 8 blue marbles, 7 red marbles, and 6 yellow marbles. How many marbles does it take to pull out 3 marbles of the same color. (A)6 (B)9 (C)12 (D)15 (E)I

*asked by Tom on November 16, 2014* -
## Fifth Grade Math

How do you explain how to do this math problem to a child? 7/10 of the U.S. population (175,104,000)in 1991 believed saying A to be true. What is the total population? We are trying to find what the whole population total is. They have given us 7/10 or

*asked by Tiffany T on December 14, 2009* -
## ALGEBRA 1

In a certain math course, a student needs between 720 and 810 points in order to get a B. The final exam is worth 200 points. If Cathy has 582 points just before the finals, what range of scores on the final exam will give her a B for the course?

*asked by HELP HELP HELP MNHS on January 7, 2013* -
## Calculus

Math questions, please help me? :(? Find the composite functions f o g and g o f for the given functions. f(x) = 10^x and g(x) = log x State the domain and range for each: f(x) = 4x + 1 and g(x) = x^2 f(x) = sin x and g(x) = x^2 - x + 1 f(x) = 10^x and

*asked by Britt on September 2, 2013* -
## Math (integrals) (Substitution)

I am given an integral to solve with given substitution values. I got an answer, but I'm not quite sure if it's correct as an online integral calculator gave a different answer. ∫ x sqrt(4-x) dx Given that u = 4-x . In this case, x = 4 - u du = -dx Now..

*asked by Ray on May 6, 2017* -
## math

alan scored a total of 14 points for answering all 15 questions on a math quiz for every correctly answered question alan got 2 points for every wrong ahe lost 2 points how many questions did he answer correclty

*asked by Anonymous on November 8, 2012* -
## math

Find the representation of the number 256 in the following bases: a. base six b. base twelve c. base two I get how to write the number of objects as a base(whatever), but I think this is asking me to start from the end number and work backwards. I really

*asked by Lauren on September 3, 2009* -
## math,correction&help

Is this right:if it still needs more can someone help me out what else can i say....thanks why are polynomials important? polynomials are important because the are used to determine and solve the unknowns in equations. Many natural processes can be modeled

*asked by jas20 on March 5, 2007* -
## math

alan scored a total of 14 points for answering all 15 questions on a math quiz for every correctly answered question alan got 2 points for every wrong ahe lost 2 points how many questions did he answer correclty

*asked by Anonymous on November 7, 2012* -
## Math

We are currently studying "earning money" for math. I read this sentence: When a store claculates its profit as a percentage of its cost price the profit is always bigger than the profit calculated as a percentage of the selling price. What does it mean

*asked by Jason on February 10, 2012* -
## Math (not specific knowledge, just research)

For math class, we are planning an indoor carnival. We need to figure out the size of each exhibit and vendor, and make sure all of them fit into the space. We can choose any large indoor space we can think of. I did some research online and chose the

*asked by Adriana on March 12, 2009* -
## statistics

a simple random smaple of 55 mathematics teachers were timed as they completed sudoku puzzles. Their mean completion time was 20.3 minutes. The population standard deviation is assumed to be 12 mintues and times vary normally. Find 99% confidence interval

*asked by Ashley on March 23, 2011* -
## High School Math

I'm helping my little sister in her math homework. I just got stuck in this problem. Can anyone please help us out. I'm guessing it's letter C. Am I correct? A small company borrows $50,000 at 11% compounded monthly. The loan is due in 4 years. How much

*asked by Jasson on July 9, 2009* -
## Algebra

For questions 1-5 solve the equation. 1.-2v-7=23 (A)15 (B)8 ★ (C)-8 (D)-15 2. X/3-10=-12 (A)-6 (B)-66 (C)6 (D)66★ 3. d/3+10=7 (A)51 (B)20 ★ (C)0 (D)-9 4. 2(2-2x)=-3x (A)-4 (B)4 ★ (C)6 (D)0 5. 2.9n+1.7=3.5+2.3n (A)3 (B)-3 (C).3 (D)1 For questions

*asked by J on December 3, 2016* -
## algebra

Suppose that these 15 measurements are respectively labeled x1,x2,..,x15. (Thus,-27 is labeled x1,62 is labeled x2,and so on.) Find. 15 over the sum sign and i=1 under the sum sign(x1 + 43) I ahve no idea how to solve this becaue I never seen this type of

*asked by treshia on March 22, 2011* -
## MATH HELP

shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?

*asked by Olivia on August 22, 2014* -
## Math

Capacity Homework? I was doing my grade 8 math homework on capacity, and I was told to order the capacity of Vase A, B, and C from least to greatest. Vase C is a hourglass based prism, and I don't know the formula for it. Please help?

*asked by Anonymous on January 5, 2015* -
## math mental math

shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?

*asked by Summer on August 22, 2014* -
## please check my answers Ms Sue!!!

Using NOT when searching allows you to ______? search for subtraction math games eliminate unwanted topics to narrow down for search search for more than one topic narrow down your topic by combining words**

*asked by lilly on October 26, 2015* -
## Calc.

Let h(x)=16-4x-(x^3) Find g(96). My work: 96= 16-4x-(x^3) (-x^3)-4x-80=0 Using the rational roots theorm, I found that x=-4 so h(-4)=96, therefore g(96)=-4. Find g'(96). My work: g'(96)= 1/(dh/dx at x=-4) 1/((-3(-4)^2)-4)= -1/52 Does this look ok? Also, my

*asked by Joshua on April 15, 2009* -
## Is this right Ms Sue ???

Using NOT when searching allows you to ______? search for subtraction math games eliminate unwanted topics to narrow down for search *** search for more than one topic narrow down your topic by combining words

*asked by lilly on October 26, 2015* -
## please help Ms Sue !!!!

Using NOT when searching allows you to ______? search for subtraction math games eliminate unwanted topics to narrow down for search search for more than one topic narrow down your topic by combining words

*asked by lilly on October 25, 2015* -
## Re: Physics/Math

A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the

*asked by COFFEE on February 11, 2007* -
## Math

A student wrote this statement: "A triangular prism has a height of 15 inches and a base area of 20 square inches. The volume of the prism is 300 square inches." Identify and correct the error. I am not sure because I am new at doing this kind of math.

*asked by Patrick on February 23, 2018* -
## art

this image was created by using basic math concepts that include all of the following except A)knowing how to create a pattern B)using understanding the angles of the shapes C) a basic understanding of different geometric shapes. D) applying appropriate

*asked by tom on October 5, 2016* -
## math

Fewer than 107 girls attend a basketball camp. A total of 180 children attend at the camp. Which inequality can be used to find the number of boys n tha might have attended the basketball camp? math problem

*asked by breanna on February 14, 2012* -
## Math

Mr.Customs is correcting the classes math home work on customary units. which of the following measurements are reasonable? A. a pencil is 12 ft. long. B. The back porch is 12 inches long C. the 3rd hole on the golf course is 123 miles long. D.the distance

*asked by Angel of Darkness/DarkUnicorn on December 11, 2018* -
## Math

Math Problem: Find the area of a circle that has a radius of 14 feet. Round your answer to the nearest hundredth. Would someone please check the way I worked this and let me know if I did it correct or not? Thank You A=3.14 (14ft)2 A=3.14 (196) A=615.44 Im

*asked by John on April 26, 2013* -
## math

On a T.v. game show a contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability what is the expected value of the selection if the three doors behind them have

*asked by Rmz on January 17, 2010* -
## Art Help!

How is this artistic creation an example of a combination of art and science? It is a picture of an oragomi shrimp made out of brown paper with black eyes. A. It is a creative sculpture of a shrimp. B. It is not anatomically correct. C. It is made with

*asked by Callie on November 14, 2014* -
## curriculum development project

My topic is community and I have to form a paragraph from the 10 activity plans such as math, science literacy, dramatic play, language and literature, puppets, music and movement, sensory centers, art, science and social studies. the paragraph consist of

*asked by Maryann on October 9, 2011* -
## math

The city council has decided to add a 0.3% tax on motel and hotel rooms. If a traveler spends the night in a motel room that costs $55 before taxes, how much will the city receive in taxes from him? I am studying for a exam, would you also know a good

*asked by amelie on October 18, 2010* -
## Math

John has 4 math books, 6 biology books,, and 8 statistics books to arrange on a shelf. In how many ways can he arrange the books so that books on the same subject are grouped together?

*asked by Reet on April 7, 2013* -
## math

i don't understand standard form math and i have to questions what is nine hundredths in standard form and sixteen and six tenths in standard form?

*asked by tamija on September 23, 2008* -
## English

1. He won first place in the math contest. 2. He got first place in the speech contest. 3. He received first place in the science contest. (Are they all grammatical? Can we use all the verbs?)

*asked by rfvv on June 19, 2013* -
## Math(Unit Rate)

If 20 units= 10kg whats the unit rate? http://www.eduplace.com/math/mathsteps/6/e/ is that your gf? "sam"???? 20/10 reduce,= 2/1 divide,=.5 Kg/unit calculate the unit rate what dose this mean Find each unit rate. $112 in 8 hours

*asked by Sean + Sam on November 13, 2006* -
## statistics

Answer the question(s) based on the following situation: 150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center ì = 65 and standard deviation ó = 10.The third quartile of the scores

*asked by Whitney on March 17, 2010* -
## math,algebra

why are function notations important, are they really that important in todays world. Why do make math difficult. what are function notations i don't understand why they are important. 1934.3847569

*asked by jasmine20 on December 27, 2006* -
## Math

My math teacher said to use the FOIL (First Outer Inner Last) property to simplify these quadratic equations I have made from looking at two parabolas. Here are my equations & how would you use the FOIL property on each of the equations and also can

*asked by Alex on December 4, 2014* -
## Math

Shelly is working 250 math problems and she wants to finish in 6 days. If she works the same number of problems each day for 5 days how many problems will she have left to work on day 6?

*asked by Valerie on March 21, 2016* -
## math and desperate

What similarities and differences are there between functions and linear equations? Are all linear equations functions? Is their an instance when a linear equation is not a function support your answer. Im not good at math please help.

*asked by tera on January 25, 2009* -
## math

I need a formula. At a math contest,12 problems were given. Five points were awarded for each correct answer, and two points were deducted for each incorrect answer. Matt's score was 39. How many correct answer did he have

*asked by mike on April 1, 2015* -
## math

the mass of 3 dictionaries and 2 textbook is 8 kg and the mass of 3 dictionaries and 3 textbook is 9 kg. find the mass of 5 textbooks? math - Steve, Monday, September 19, 2016 at 5:17am 3d+2t = 8 3d+3t = 9 clearly, t=1 i cant understand it

*asked by murtaza on September 19, 2016* -
## 9th grade math

Hey i need help on my math hw i just don't get it lol please help me! Here the questions Which of the following equations has a graph that is parallel to the graph of 4x-2y=7? A:-2y = 4x+2 B:7-4x=2y C:4x+2y=2 D:-4x-2y=-7 E:2y=4x+7 Determine if the two

*asked by please help me on March 1, 2009* -
## Math

Hey i need help on my math hw i just don't get it lol please help me! Here the questions Which of the following equations has a graph that is parallel to the graph of 4x-2y=7? A:-2y = 4x+2 B:7-4x=2y C:4x+2y=2 D:-4x-2y=-7 E:2y=4x+7 Determine if the two

*asked by Anonymous on March 1, 2009* -
## Math

1. What type of graph does not show the number of times a response was given? (1 point) box-and-whisker plot line plot stem-and-leaf plot bar graph 2. Which of the following types of information is suited for display on a scatter plot? (1 point)

*asked by Anonymous on April 5, 2013* -
## math

If a single letter is drawn from the set( matheics) what is the probability that the letter drawn is a member of the set (math)

*asked by jessica on September 21, 2009* -
## Geometry: Right Triangles

In my math homework, it is asking me to find the height of a triangle. Does anyone know how to find the height of a triangle? If you could, could someone give me an example problem? Thanks a lot!

*asked by Anonymous on December 3, 2017* -
## math

my math homework tells me to find the area of a circle using it's circumference. the circumference given was. can someone explain to me how to find the area?

*asked by elijah on April 14, 2015* -
## algebra

A math class has a total of 47 students. the number of females is 17 less than the numberof males. how many males and how many females are in class?

*asked by greg on February 8, 2015* -
## math

a student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly?

*asked by monica on August 10, 2013* -
## 4 grade math

i have a question on a math problem, please#1 explain why 7*8 is not a number sentence. Next question is write two true number sentence. thank you!

*asked by pat on November 10, 2009* -
## adult education

Math If the line passing through the points (1,a) and (4,-2)is parallel to the line passing through the points (2,8) and (-7,a + 4), What is the value of a ? Please help, I don't understand how to set this one up.

*asked by Vanessa on May 26, 2009* -
## English

I just want to see if these are correct. Orig.1.He was sad to leave. (superlative) S/B 1. He was saddened to leave. Orig. 2. She ran as fast as the others on the team (comparative) S/B 2. She ran faster than the others ran on the team Orig. 3. Throughout

*asked by Margaret on September 5, 2006* -
## Math

Math help??? 1.) 13 1/3 divided by 6 2/9 2.) 15 * 4 2/3 3.) 10 2/3 divided by 4

*asked by Kimberly on September 19, 2011* -
## Math

Math help??? 1.) 13 1/3 divided by 6 2/9 2.) 15 * 4 2/3 3.) 10 2/3 divided by 4

*asked by Cathy on September 19, 2011* -
## algebra 1 help

fin the complement and the supplemnt of the angel measure 1) 130 complement-40 suplement-50 or vice versa if anyone can help me with some algebra work it would be greatly appreciated i am im algebra 1 and still on the second quarter and have until november

*asked by cristina on August 21, 2005* -
## social studies

Why should the 3 R's be rehabilitated? Thank you for using the Jiskha Homework Help Forum. If, by the 3 R's, you mean "Reading, Riting, Rithmetic" you would be illiterate without them. Aside from their being so much enjoyment in reading, what would happen

*asked by Kelsey on February 11, 2007* -
## Math

Posted by Lance on Friday, April 27, 2007 at 9:47pm in response to math. please give us one set of numbers so we can work an example for you. What was the percentage increase in motor vehicle production in countries outside the United States from 1950 –

*asked by Sissy on April 28, 2007* -
## Math

Eli's Dad made him a birthday cake, but forgot to buy candles. He could only find a few. But Eli was smart in math, so his Dad said "The ratio of candles to years is 3 to 5" That gave him the right number. How old was Eli? I am very confused on how to even

*asked by Patrick on March 2, 2016* -
## math test

Hi! I have a math test coming up tomorrow, and I need to prepare. but,i don't know how I should. . . any help would be great. she told us to: Be prepared to identify and explain functions, linear functions and proportional functions. Be prepared to use the

*asked by Keon on October 12, 2007* -
## Physics

I have to make up my own standardized questions for a project, and I wanted to make sure I did my math right. Can someone please check it? Thanks!! If your mass was 60 kg, the earth’s mass was 6×10^24 kg, the radius of the earth was 6.4×10^6 meters,

*asked by Emily on April 14, 2008* -
## Geometry

A satellite in a nearly circular orbit is 2000 km above Earth's surface. The radius of Earth is approximately 6400 km. If the satellite completes its orbit in 112 hours, calculate the speed of the satellite in kilometers per hour. Please help me. I have a

*asked by Skye on January 23, 2011* -
## Math

Hi, would someone mind just checking the answer I got for this formula and tell me if I'm on the right track or not. Question... x+y=21 3x=4y Answer I got... x=84 y= -63 I didn't get that. Check your math. I found 7y=63 but not y = 63. You can always check

*asked by Jessica on October 22, 2006* -
## English

A: (Are) (you) (doing) your homework? [3 points] B: Yes, I am. I'm doing math homework. 1. (You) (are) (doing) your homework? =========================== There are three blanks in the first sentence. Students are asked to fill in the blanks with suitable

*asked by rfvv on July 9, 2018* -
## Math

Math - Cindy, Tuesday, April 29, 2014 at 8:44pm At Bobs diner, it costs $8.00 to purchase two hamburgers and one order of fries. The "family pack" costs 30.00 and comes with six hamburgers and six orders of fries. If the prices are constant,how much does

*asked by Anonymous on April 30, 2014* -
## Math

Consider the weighted voting system [75: 31, 29, 23, 16, 8, 7]. Find each: a. The total number of players b. The total number of votes c. The weight of P3 d. The minimum percentage of the votes needed to pass a motion 9rounded to the next whole percent)

*asked by Meredith on July 27, 2012* -
## math

I suggest you Google each of these people. You can search for the name bio Or you can search for the name height weight. for math i have to do a graph of some sort, so i chose to do a graph of famous ppls heights and weights, so i was wondering do you know

*asked by Ms. Sue on February 8, 2007* -
## Math help

here's the question Dear Dr. Math, I wanted tto find the area of this hexagon. I few the apothem as I've shown. Then I measured the apothem and perimeter. I used the formula a=1/2ap and got 3.2cm^2 for the area but that seems way too small for me. I think

*asked by Rae Rae on February 22, 2010* -
## math

solve the compound inequalities as demostrated being careful of how a negative x- term is handled in the solving process show all math work arriving at the solutions display a simple line qraph for each solution set as demostrated. -119 (your or Copmound

*asked by mace on March 5, 2013* -
## SAT

is there any helpful practice sat tests online other than the college board? i'm taking the test this saturday and i don't feel like i'm ready for it. i have studied the SAT prep book that i have, as much as i can. i especially need help in the math and

*asked by y912f on October 6, 2009* -
## Calculus - Integrals

I know I've probably flooded the site or something (Sorry if I have), it's just that these problems aren't similar to anything I've reviewed in class. I've got two more questions, then maybe 1 or 2 more coming. That's all I can see in the future, anyhow.

*asked by Sean on March 15, 2008* -
## math

If a man drove 3.5 miles to a gas station and on the way home drove 2 times that +.7 miles,how many miles did he drive?? 3.5 + 2 times 3.5 + .7 = what Do the math. 17.5 omg ur so smart...

*asked by Caitlyn on June 7, 2007* -
## Math

On a math test,12 students earned an A. This number is exactly 25% of the total number of students in the class. How many students are in the class? 'In this problem I'm not sure whether I'm being asked to solve for one or two unknowns. May I have your

*asked by Cliff on July 21, 2010* -
## 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%? (b) If 60 students took the exam, how many got a score between 50% and

*asked by kevin on March 28, 2010* -
## Math

math A particle A is projected vertically upwards from a point O on horizontal ground with speed 20ms. At the same instant a particle B is released from rest at point P which is 30 m above the ground. The point P Is not directly above O ignore air

*asked by Mech on January 19, 2017* -
## Math percentage

I don't really understand percentages grade 6 math. 1.60% discount on a 7$ item so items price is 40% of original so 0.4 x 7= 2.8$? 2. A population of 1500 people increases 15% each year how would this question be done? 1500 x .15=225 so the next years

*asked by kelly on July 27, 2009* -
## phys

The speed of ocean waves depends on their wavelength Î» (in meters) and the gravitational field strength g (in m/sË†2) in this way: V=KÎ»Ë†p GË†q Where K is a dimentionless constant. Find the value of the exponents p and q. Consider the

*asked by Cheyenne on August 29, 2005*