# Critical Thinking/Math

141,134 results, page 70

### MATH CHECK ANSWERS

CHECK THESE MATH ANSWERS PLEASE 1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.12:30(I PICK THIS) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9? Choose all that apply. A.3:2 B.18/27 C.30:45 D.24...

### MATH CHECK ANSWERS

CHECK THESE MATH ANSWERS PLEASE 1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.12:30(I PICK THIS) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9? Choose all that apply. A.3:2 B.18/27 C.30:45 D.24...

### math

Robert's acct p $98.50 has been delinquent for three months. Office procedures charge a 2% service charge after 90 days componded monthly and is added to future bills. What will be the amount owed after nine months? I did $98.50 x 2% = $1.97 $1.97 x 6months = $11.82 $98.50+ $...

### Math

Hello I was wondering if you can help me with some math. I cant figure this problem and when my friend helped me they came up with a different answer. The question is find the surface area of the cylinder. The radius is 8 and the height is 8. Use 3.14 for pi and round to the ...

### Math (5th grade)

There are 8 more girls than boys in the Math Club. The club has 44 memebers. How many boys and how many girls are in the club? Show your work.

### math

on her first two math tests, Gracie has an average score of 86. If she got a score of 92 on the first test, what is her score on the second test?

### 10th grade English

This is my personal reflective essay. Please fix any mistakes or awkward phrases ASAP My body and my mind became lighter than air around me, as I threw myself on a couch where my back enjoyed being at. Released from the monstrous term of school, I felt saint-like, as if I ...

### 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 1755,104,00. How do we ...

### Math- Reiny can you help me with this question

I know how to do the work, but the way the question is worded I am not sure the answer. The math works comes out to -2 which is b but if you want the number less than -2 the answer is c. Which are they asking for . This is my work. Which is the value is in the solution set for...

### 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

### math-calculus

30/x^2-25 = 3/x-5-2/x+5 i be left with 30 = 3x^2-75-2x^2+50 i not sure what to do? i use the quadratic formula? math-calculus - Steve, Saturday, January 7, 2012 at 3:38pm First, you have to simplify properly: 30/(x^2-25) = 3/(x-5) - 2/(x+5) 30 = 3(x+5) - 2(x-5) You were ok ...

### 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)

### English Grammar

Which sentence uses proper grammar? I'm bored by math class. Or I'm bored of math class.

### 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 70%?

### math

An art student wants to make a model of the classroom. The length of the classroom is 2.4 times its width. The length of the students model is 42 in. What should the width of the model be? a. 17.5 in b. 20.5 in c. 83.6 in d. 100.8 in Use mental math to determine the solution x...

### math

in a grade 7 class, 36 students are either members of the math club or science club or both. 10 students are members of both clubs. if 31 students are members of the math club how many are members of the science club?

### Please Help Me With My Math Homework

I wrote my math homework questions. It's in Jiskha Homework Help Forum In: Name:Tanisha Subject:Math Thank You! I already replied, you don't need to make a new question asking someone to answer...... Thanks for the answer! It was a good help! the product of 7_ ,4_ , and 1_ IS...

### math

I was wondering if someone could help guide me with this problem.. math is my worst subject... I would appreciate it definately, thank you.. 3 1/5 divided by 7/8 x 2/3= I think I am making it too hard on myself... my first step would be to change the mixed into an improper ...

### math

Urban Community College is planning to offer courses in Finite Math, Applied Calculus, and Computer Methods. Each section of Finite Math has 40 students and earns the college $40,000 in revenue. Each section of Applied Calculus has 40 students and earns the college $60,000, ...

### math

Solve following system of equations? x+3z=-2 2x+2y+z=4 3x+y-2z=5 i need help with few so i can get hang of this math plz. Perform row operations write new matrix [132 -312 2-11| 073] R1+R2 using x,yand z variables write system linear equations represented by matrix [702 0174-...

### Last Math problem I promise

a cellular phone company offers a contract for which the cost C, in dollars of t minutes of telephoning is given c=0.25(t-300)+65.95 where it is assumed that t >== 300 minutes what times will keep costs between 106.20 and 139.20? I am already lost at word problems... please...

### 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 $40000 foreign car, a $3...

### MATH PLEASE HELP

Anna mixes the letters S, E, L, E, C, T, E and D thoroughly, without looking, Mary draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that E will not be the letter mary selects A 3/8 0.375 37.5% B 8/5 1.6 16% C 5/8 0.625 62.5% D 8/3 2....

### math

What is the definition for an EXPRESSION ? An expression in English can be a short sentence, or a sentence fragment. Take a hike. Go figure. What's up? Whatever. In math, an expression is again a fragment, it can be complete or not complete. 2x + 1 Sin^2(2x) + 2 e^(2x + ...

### HSPA

In my school, I have to pass the HSPA in order to graduate. We had to take the Language and Math HSPA in March. In order for a student to pass the HSPA, you have to get a score of 200 or more on both parts. I received exactly a 200 on the Language part of the HSPA which mean I...

### math-5

Tara spent 3 hours doing homework. She spent 1/3 of her time on math and 1/5 of her time on science. What is the total time Tara spent on her math and science homework?

### Math Formula Part 2/3

I've done the second part to the Math Formula post. It was determine the 19th term of the sequence which I did. Now it says..which of the numbers -268 and -350 are terms of the sequence? I was doing something like this: tn = -7 (-268) +19 I was plugging -268 as n. But that ...

### 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 resistance. Find thr time ...

### Math

Hi. This is my question: An art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with string. What would be the radian measure of the angle between two adjacent pieces of string, in simplest form? ...

### Grade 12 Data Management math

I'm doing math through correspondence so material is not explained very well. I would appreciate if someone could explain this to me. This lesson is review of set theory and first degree equations. Indicate whether each of the following statements is true or false. If the ...

### World History (Ms. Sue)

Doyou agree with that which I have written for the topic that I was given? Describe the emergence of Romanticism in art and literature, social critisim, and the move away from Classicism in Europe. In the late seventeenth century, an intellectual movement known as the ...

### PLEASE HELP CHECK? MS. SUE ANYONE?

How is this so far? and what else should i add, i need two pages and i have only one done, due today. help? I'm doing like a journalist. I Josephine A. Walker was a slave for Harry Richardson. Every morning I had to serve him, I had to be up by 4am and was unable to go to bed ...

### English

can you help point out any stylistic devices in this poem? He seemed to know the harbour, So leisurely he swam; His fin, Like a piece of sheet-iron, Three-cornered, And with knife-edge, Stirred not a bubble As it moved With its base-line on the water. His body was tubular And ...

### math confused

it took marty 42 min to write a book report. then he spent 18 min correcting this report. explain how can you use mental math to find how long marty spent on his report?

### Math

The 13-member math club needs to choose a student government representative. They decide that the representative, who will be chosen at random, CANNOT be any of the 3 officers of the club. What is the probability that Samara, who is a member of the club but NOT an officer will...

### Math

In math class, a student has an average grade of 85% for five tests so far. What grade must that student earn on the next test to reach an average grade of 90% for all six tests?

### 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 interest will the ...

### English

I posted this yesterday, that I need to modernize an Ancient Greek myth. bobpursely replied with an idea that I could do the Siren sisters as cheerleaders, but I couldn't find a myth about them, they're in two different myths. Like I've been thinking of myths such as Hercules'...

### Math

I need need help with this math problem. I need to know do I start from left to right with the parentheses or brackets first. (15-5)/[(12/2*2)-2] Brackets first Work from the outside in. When you wrote 12/2*2, it is not clear whether you mean 12/(2*2) or (12/2)*2. If you meant...

### grammar

WERE DO YOU LEAVE COMMANTS? DO YOU KNOW ANY PLACE IN CALIFORNA/ TEMECULA WERE THRE IS FREE TUTORING?ARE YOU TEACHER? IF YES FROM WHAT SCHOOL? DO YOU ALSO TEACH OR TUTOR MATH? IF YES THEN I NEED SOME HELP AND TIPS IN MATH. DO YOU ALSO TEACH SCIENCE?I ALSO NEED SOME HELP ON THAT...

### 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 population would be 225...

### math

whatis the effective rate of $23,000 invested for one year at 6%, compounded semiannually? round your answer to the nearest tenth. could you help me with this one? i need to see the math worked out please. do you have one worked out on the page so i don't have to wait too long.

### Math

3.Max says there were 6 students wearing shorts in his math class. He is not sure how many people were in the class, total, but he thinks about one third of them were wearing shorts. A. What percent is closest to 1/3 ? Explain. B.Write and solve a proportion below, to estimate...

### outline

I need help on constructing a persuasive speech outline. Do you know a good website that will show me how to do this? Thanks. Persuasion and argument are almost the same thing. The principles for writing an argument (essay or speech) are the same. http://www.powa.org/argument/...

### Chemistry!! Please Help!

A 0.285 M solution of the sodium salt, NaA, of the weak monoprotic acid, HA, has a pH of 9.65. Calculate Ka for the acid HA. I think I am having issues with the equation and then the math part. I figured out what 'x' was from the pH, which I believe is 2.2x10^-10, but when I ...

### math

John's account of 98.50 has been delinquent for 3 mnths. After 90 days office charges a 2% service charge, compounded monthly that is added to future bills. What would be the amount owed after nine months? My math is 98.50 x 0.02= 1.97 1.97 x 12months =23.64 Take 3months off ...

### 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 like mary careys ...

### Math

Janice wants to know the total number of games won by the Denver Nuggets basketball team over the three seasons shown in the table. What expression should she simplify? Explain how she can use mental math and the properties (Associative, Commutative, Distributive, or Identity)...

### chemistry

If a chemistry student collected 825 mL of gas at 25 degrees C and 7.90*10^2torr, how many moles did she collect? PV=nRT Put P in atmospheres. torr/760 = atm. V is volume (in LITERS.) solve for n, the number of mols. R is a constant of 0.08206 L*atm/mol*K T is temperature in ...

### math

hi i will ask u in math :) in (( distance between two points )) * three vertices of rectanglr WXYZ are W (4,3), X (-1,3), and Y (-1,-1), what sre the coordinates of Z ? ** two adjacent vertices of a square have coordinates (-1,-3) and (1,0), what are the possible coordinates ...

### math

John's account of 98.50 has been delinquent for 3 months. After 90 days office charges a 2% service charge, compounded monthly that is added to future bills. What would be the amount owed after 9 months? My math is 98.50 x 0.02 = 1.97 1.97 x 12 months = 23.64. Take 3 months ...

### Math

Nine wonderful students decided to buy their math teacher an expensive present, each contributing the same amount of money. Four other students found out about the plan and joined in, agreeing to pay their share of the present's cost. This resulted in a saving of $33.32 for ...

### math

can u please help me with this math problem. i don't get how to do this question. Mrs. Mabie has a rectangle swimming pool that measures 25 feet by 14 feet. She wants to have a cement walkway installed around the perimeter of the pool. The combined area of the pool and walkway...

### Math

Paul was given this math problem on a test to simplify: 1/4 + (5/8 + 1/2). after calculating, Paul mistakenly simplified to 9/32 as his final answer In which step did Paul make his first error? Show your work! My work Paul's work 1/4 /9/8 1/4 /(5/8 + 4/8) 1/4 x 8/9 1/4 + 8/9 ...

### eth

how do you think slavery influenced the evolution of both black and white america today? is there any websites that might help me with this question? As I was starting to answer your question, I had a conversation with BobPursley. He has summed this answer up better than I ...

### History,geography,math lite and tourism

I am doing grade 11 and i was wondering if you guys can help me found out which jobs i can do if im doing tourism,geography,history and math lite

### Business study,econamics,math lit,tourism

Which job i can get choosing dis subject MATH LIT,ECONOMICS,BUSINESS STUDY AND TOURISM

### 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 new function ...

### algebra 2

Ralph, Mario, Jack, Laura, and Maria are in the math club. The club advisor will assign students to 3-person teams at the next math team competition. How many different 3-person teams can be formed from these five students? I got this wrong...here was my answer 5*4*3/(2*1) 60/...

### 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 someone help me with ...

### Math

In a math contest of 10 problems, 5 points was given for each correct answer and 2 points was deducted for each incorrect answer. If Nancy did all 10 problems ad scored 29 points, how many correct answers did she have?

### Math

Several students were surveyed about their favorite class. 26 students chose art 19 English 21 math 16 music 32 science. What fraction of the of the students chose music as their favorite subject.

### Math

Several students were surveyed about their favorite class. 26 students chose art 19 English 21 math 16 music 32 science. What fraction of the of the students chose music as their favorite subject.

### science

I was curious about formaldehyde after reading somewhere online where this man went and drank a beer which was apparently contaminated by by formaldehyde. (He heard a story by some local that the water used was near a cemetery and thus the contaminated water) I have heard and ...

### math

A math contest consists of ten problems.Three points are given for each correct answer. One point is deducted for each incorrect answer. Andy answers all the problems and scores 18 points. How many correct answers does he have?

### 8th grade math

I am in 8th grade math as a sixth grader. I am stuck on one problem. It is this: You are making a necklace that is 9 inches long. You use 6 beads for each inch. what integer is the change in your supply of beads after making the necklace?

### Math

I have a question for math that I attempted to, I would like to make sure it was right by asking you guys. Here it is 45) Jerry was making lemonade from frozen concentrate. The directions say to empty one can of the concentrate into a one gallon container and add three cans of...

### math

I am not great at math, but i am practicing slowly... Joanne’s odometer read 25,230 miles at the beginning of a trip and 27,215 miles at the end. If she used 35 gal of gas for the trip, what was her mileage (? mi/gal) now do I subtract 25, 230 from 27,215 and then divide 35?

### math

Sarah was trying to figure out her grades for her math course. She only knew the grade of 4 tests she had taken, however the class had taken 5 tests total. She scored a 94, 67, 83 and 93. If Sarah ended up with a grade of 90, what did she get on the 5th and final test?

### Math

Barb and tammy shared a sub sandwich, but while Tammy was setting the table, Barb ate 2/5th of it. When Tammy came back, she ate 3/4 of what was left. How much of the sub did Tammy eat? Write a math equation.

### Math

9 students in a group found that their mean score was 86 for the first math test. On the next test, each student in the group scored 7 points higher than on the first text. What was their mean score for the two tests? Any help would be appreciated.

### math

wat is a corresponding angle.............. in the math 8th grade is really most of the test goin to be angles In triangles, it is the angle between two specified sides. It also refers to tha angles formed when one line cuts through two or more parallel lines, as in www....

### psy

Father: Information collected on elementary school children have indicated that for the most part, the more cavities children have, the better they are at math. Since I want my daughter to improve her math skills, I now make sure she eats candy with every meal. In adopting the...

### to Katie A A

#1 - The school subject is MATH, not "help" -- I've never heard of a school subject called help. #2 - To quote one of our very good math and science tutors: “You will find here at Jiskha that long series of questions, posted with no evidence of effort or thought by the ...

### Math

On a quiz a student answered 16 questions correctly. This was 80% of the questions on the quiz. How many questions were on the quiz? 6th grade math.

### English

Can some check my personal narrative and give a grade from 1-5? Mario Garcia 10-10-11 Period.3 The Lost Dog I didn’t feel like helping my sister wash my dad’s car. After our dog left this morning we were both sad, we didn’t feel like doing anything but to just search for...

### Math

Hi! I need help with the following math problem: A building has 4 columns, each of which is 15 ft high and has a circumference of 1 2/3 yards. 1. Find the lateral surface area of the 4 columns. 2. How much will it cost to paint the 4 columns if paint costs $1.10 a square yard...

### 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 need help. I have two ...

### math

Assume the average height and weight of a female in your math class is 5'5" and 140 pounds. Use this information to write a variation equation then use it to find the weight of the female below if they had the same body type as the average female. Round answer to the nearest ...

### math

21. Ted Williams made deposits of $500 at the end of each year for eight years. The rate is 8% compounded annually. Using the tables in the Business Math Handbook that accompanies the course textbook, calculate the value of Ted's annuity at the end of eight years. A. $4,318.30...

### math

I am helping my 3rd grader with a her math and me and my boyfriend can not agree on the answer to this question..can anyone give the answer and tell how to solve it. THANK YOU! Darin counted 46 more cars than trucks in a parking lot. There were 29 trucks. Write an expression ...

### ELEMENTARY STATISTICS

50 MATH PROFESSORS WERE ASKED HOW LONG IT TAKES TO GRADE A STUDENT'S HOMEWORK ASSIGNMENT. THE MEAN GRADING TIME FOR THE SAMPLE WAS 36.2 MINUTES WITH A STANDARD DEVIATION OF 4.8 MINUTES. WHAT IS THE 99% CONFIDENCE INTERVAL FOR THE MEAN GRADING TIME OF ALL MATH PROFESSORS?

### Math

All 231 students in the math club went on a field trip some students Road in bands which hold seven students each and some students Road and buses which hold 25 through and see how many of each type of vehicle did they use if there were 15 Vehicles total

### math and physics

i just want to know form where i got on this formula the 4.9t² on this formula s=4.9t²+Vot+h because the book only say that a physics theory shows that when an object is thrown upward with an initial velocity Vo, its approximate height is given by that quadratic function i ...

### math

the cost of 2 televisions and 3 dvd players cost 1421 dollars the cost of 1 dvd player is half the cost of of 1 television what is the cost of 1 television. How you could slove in simple math

### Math repost for Jake

math - jake, Friday, December 7, 2007 at 2:06pm How many cats are in a small room if in each of the four corners a cat is sitting, and opposite each cat there sits 3 cats, and at each cat's tail a cat is sitting?

### Math - Discrete math

1). Let G be the statement: " for all real numbers a and b, if a -|_a_| < 1/2 and b - |_b_| < 1/2 then |_a + b_| = |_a_| + |_b_|" (the symbol is for the FLOOR of a and b) A. is G true? prove it b. state wether the CONVERSE, CONTRAPOSITIVE AND NEGATION ARE TRUE and prove...

### MATH HELP HELP NOW NOW

Lesson 12: Operations with Fractions Unit Test CE 2015 Math 7 A Unit 5: Operations with Fractions and Rational Numbers Assessment Assessment someone look it up and answer all the questions plz

### MATH PLEASE HELP

1) -5g-6 for g = -2 2) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the equation? x-2 = 16 4) use mental math to solve the equation. z/-12 = -5 5) estimate the solution of the equation x-8.1 = 5.3 to the nearest whole ...

### Algebra 1

1.Which of the following situations best describes a student engaged in active learning. A. A student uses only one of the resources provided by the teacher*** B. A student skips parts of lessons that he or she finds difficult C. A student records questions to ask the teacher ...

### science - chemistry

Hi everyone, I have been trying to solve these two questions but am having trouble doing so and was wondering if someone could help me out. (1) You wish to make a 0.200 mol/L PIPES buffer (PIPES: 1,4-Piperazine-N,N'-bis(2-ethane-sulfonic acid), C8H18N2O6S2, pKa = 6.80) at a pH...

### Chemistry

Thinking about the uses of radioactive isotopes, which statement is true? A. The iodine isotope, I-27, is used to diagnose thyroid disorders. B. Radiation may be detected because it ionizes the atoms it affects. C. It’s clearly understood that irradiating food kills bacteria...

### English

1. There are a house , trees and a shining sun in the first picture. 2. There is an English textbook in Picture 2. Do you like English. English is fun, isn't it? 3. There are two boys. What are they doing? They are playing with a ball in the sea. 4. A math textbook is in the ...

### Math

Sarah was trying to figure out her grades for her math course. she only knew the grade of 4 of the tests she had taken, However the class had taken 5 tests total. She scored a 94, 67, 83, and 93. If Sarah ended up with a grade of 90, what did she get on the 5th and final test...

### Chemistry

Ethanol boils at a temp. of 78.29 degrees C. What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 23 g sample of ethanol initially at 12 degrees C? I know that the molar enthalpy heat of vaporization is 35.56 kJ/mol and the specific ...

### math

4th grade math homework. rounding sums and differences. paper say "round each number to its highest place. then estimate the sum or difference." example says 92 +28= then says round to 90 and 30 to make 120. further down numbers get larger 12646 + 9103= do i round to the tens ...

### math

Dr needs 500 needles priced at 2.60 per hundred. She pays with 10 days, she receives a 2% disc; sales tax is 5.5%. What amount would you pay with discount? Is my math correct? 2.60x500=$1300.00 $1300.00x2%=$26.00 $1300.00-26.00=$1274.00w/disc My answer is $1274.00 since they ...

### Math

1) -5g-6 for g = -2 2) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the equation? x-2 = 16 4) use mental math to solve the equation. z/-12 = -5 5) estimate the solution of the equation x-8.1 = 5.3 to the nearest whole ...

### math

Math word problem: There are 25 students in Mrs. Roberts 3rd grade class. There are 9 more boys than girls in the class. How many boys and girls are in Mrs. Robert's class.