# Math

## Recent Questions

**Math**

By 7:00P.M., 1/3 or the junior class has arrived at a school dance. By 8:09PM., 30 more juniors had arrived, raised attendance to 1/2 of the juniors class. How many people are in the juniors class? I don’t understand.. can someone help? A 30 B90 C120 D180 E240

**Math**

a family of 100 ants invades your home. if its population increases at a rate of 20% per week, in how many weeks will there be 200 ants? 400 ants? and 800 ants?

**Math**

Hi! I’m practicing for the SHSAT, and I am doing some math problems. I don’t want to take advantage of this website, so I decided to ask you guys first. Am I allowed to ask lots of math questions? But I will answer them(at least the ones I know) could you help me check it...

**math**

urban encroachment is causing the area of a forest to decline at a rate of 7% per year. what is the half-life time of the forest?

**math**

a daily newspaper had 12,125 subscribers when it began publication. five years later it has 10,100 subscribers. what is the average yearly rate of change in the number of subscribers for the five year period?

**math**

in 2000, Sam opened an account paying 5.2% annual interest. Has his money doubled yet? if so, when did it. If not when will it? I believe this is simple interest, for it is not stated.

**Math**

A lady walks into a store and steals $100 bill from the register without the owners knowledge. She comes back 5 minutes later and buy $70 worth of goods with $100 bill the owner gives her 30 in change. How much did the owner lose?

**math**

a particular antibiotic is eliminated from the blood at a rate of 1.5% per hour. What is the half-life time of the drug?

**math**

Ron would like to have at least $150,000 saved to buy a condo. If he invests $50,000 in an account paying 6.19% interest compounded quarterly, will he reach his goal in 15 years? Show all work to justify your answer and include appropriate units.

**Math**

In order to cover upfront expenses, Pinecrest Enterprises must be able to come up with $50 million of its own capital reserves. Presently, Pinecrest has $37 million in capital reserves available, and can add $1.5 million per month . After how many months will Pinecrest ...

**Math**

Joe is the owner and CEO of Pinecrest Enterprises, a real estate development company in Boise, Idaho. The company has taken on a new development project outside of town, and Joe wants to drive out to survey the proposed development site. The site is 30 miles away from Joe’s...

**math**

in 1998 rachel opened an account paying 4% annual interest. Has her money doubled yet? if so when did it and if not when will it.

**math**

if shelia invested $5000 in an account paying 3% annual interest. how many years will it take her money to double? write it in exponential equation and rewrite it in log form. please help

**Math**

Ken had a number of colored marbles in a bag. 1/4 of the marbles were red, 2/3 of the remaining marbles were blue, and the rest were yellow. Given that there were 120 red and yellow marbles altogether, how many marbles were there in the bag?

**math**

if y =0.05x + 4.95 per month and x is the number of minutes. If you talk 140 minutes what is the monthly cost.

**math**

a technician charges $75.00 for consult plus $35.00 per hour. write an equation for the function. what are the variables represent and find the number of hours if he charged you $285.

**Math**

a machine originally cost $15,600 and at the end of 3 years value of $7500. what is the average rate of change in value per year of the machine between its purchase and the end of 3 years.

**math**

what does coefficient mean?

**Math**

A box contains 6 yellow, 5 violet & 3 pink chips. If 3 chips are tobe selected in random, what is the probability that the chips are composed of 2 violet or 1 pink?

**Math 7 A**

Audrey has 7 1/2 yd of material her new skirt will take 4 5/8 yd how much material will she have left.

**Math 7 A**

Walter had 2/4 yard of string he used 1/2 of the string for a school project. How many yards of string did he use for his project?

**math**

Given: Vertical isosceles triangles. RS bisects QT. ∠R ≅ ∠S. Prove: ∆QRP ≅ ∆TSP 2 paragraph proof

**math**

Given: M is the midpoint of LN . ∠LMP ≅ ∠NMO, ON⊥NM , PL⊥LM Prove: ∆NMO ≅ ∆LMP

**Math**

1. In order to collect data on the signal strengths in a neighborhood, Briana must drive from house to house and take readings. She has a graduate student, Henry, to assist her in the task. Briana figures it would take her 12 hours to complete the task if working alone, and ...

**Math**

A license plate consists of 3 letters followed by 2 digits. How many license plates are possible if the 1st letter cannot be I nor O, the 1st digit cannot be 0, and no letters or digits may repeat? a) 1,080,000 b) 1,166,400 c) 1,757,600 d) 1,460,160 e) 1,152,000

**Math**

(Car Sales) Of the cars sold during the month of July, 89 had air conditioning, 99 had automatic transmission, and 74 had power steering. 5 cars had all three of these extras. 24 cars had none of these extras. 24 cars had only air conditioning, 65 cars had only automatic ...

**Math**

402 students were surveyed about their preferences of sports. 140 students like football, 144 students like baseball, and 42 students like both sports. How many students like exactly one of the two sports? a) 200 b) 140 c) 284 d) 98 e) 102

**Math**

The manager of a manufacturing company knows that they will need a new machine in one of their factories. The new machine will cost them $13,700. The manager has determined that they can afford to pay 10% of the cost of the machine in cash. They can then finance the rest ...

**Math**

A problem is listed below. Identify its type. John bought a new house. He made a $4,500 down payment and financed the rest, $280,000, through his credit union. The credit union charged him 11% per year compounded monthly for 22 years. How much were his monthly payments? a) ...

**Math**

Jennifer bought a brand new treadmill on a credit plan at BeFit Exercise Equipment. BeFit will charge her 15% per year compounded monthly. If her monthly payments will be $150 for 4 years, how much was the original price of the treadmill? a) $5,390.72 b) $5,389.72 c) $5,388.72...

**Math**

Congratulations! You were the 10th caller on the KMTH morning show and you just won $9,000.00. After you calm down, you decide to put the money into a bank account so that you will have even more money for a trip to Europe. Snurling Bank tells you that they will pay 8% per ...

**Math**

Deborah deposits $200 into an account that pays simple interest at the rate of 7%. How much will she have at the end of 4 months? a) Present Value with simple interest b) Future Value with simple interest c) Future Value with compound interest d) Simple Interest e) Effective Rate

**Math**

Complaints dropped from .7 to .07 per 1,000 people. Is this equivalent to saying there was a 90 percent reduction in complaints?

**Math**

Joe is the owner and CEO of Pinecrest Enterprises, a real estate development company in Boise, Idaho. The company has taken on a new development project outside of town, and Joe wants to drive out to survey the proposed development site. The site is 30 miles away from Joe’s ...

**Math**

an organization is selling raffle tickets for 20$ each. you purchase one of 500 raffle tickets. the prize for this raffle is 6000$. what is your expected winnings?

**math**

Name the congruent angles and sides for the pair of congruent triangles. ∆MGB ≅ ∆WYT

**Math**

When doing a calculation involving zoning laws, Tim comes across the following expression: fraction a- open vertical bar a close vertical bar over denominator a end fraction, where a is either a positive or a negative number. (A) What is the value of the expression when a ...

**math**

Find the measures of the sides of ∆ABC and classify the triangle by its sides. A(3,-3), B(1,4), C(-1,-1)

**Math**

Suppose that license plates in a certain country are made up of three letters followed by 2 digits followed by 3 more letters. How many license plates can be made if no repetitions are allowed within each set. (That is, no repetition within the first set of letters, the set of...

**Math**

Simplify the following expression. Write the result using positive exponents. (-2xy^-3)^-5 / (xy^-1)^-1

**Math**

(5*5) +576

**MATH**

How do we find what "a" is equal to? I am not sure if we are supposed to put it back to tangent and then find the common denominator? Please help!?!? a cot 16 - a cot 57 = 9.167

**Math**

Dawn is 15 years old today. This is 5 times as old as her sister Eve was when Dawn was the age that Eve is today. How old is Eve today? Please help

**Sat math**

if y=m^4=n^3 and y is greater than 1 than mn=? a) y^1/12 b) y^1/7 c) y^7/12 d) y^7

**Math**

3a-4≥5 What is the answer?

**Math**

Mr. Ahn buys buys relishes for lunch party. He buys 7/8 pound of pickles and 9/10 pound of olives. How much altogether do these weigh?

**Math**

Today is Friday. What day of the week is it 80 days from today? Please help!!!

**Math**

Suppose that each number in a data set is decreased by 5. How is the median affected? 1. It is unchanged. 2. It is decreased by 5. 3. You can't tell because it depends on the values in the original data.

**Math**

Elizabeth has 256 guests coming to her class reunion. The basic meal for one meat and one side is $9.25 per person. I am still confused what to do please help!

**Math**

Only seventh grade and eighth grade girls can play on the Milton Bradley Middle School volleyball team. The ratio of seventh grade girls to eighth grade girls on the team is ¾. There are 6 seventh grader girls on the team. What is the total number of girls on the team?

**Math**

This is a two part question, make sure you answer both parts: 11, 14, 16 and 19 Find the mean. Find the median

**Math**

60 is 15% of what number

**math**

three sisters shared some mangos in the ratio 5 : 3 : 2. if the one with smallest ratio received 25 mangos , find the number of mangos shared

**Math**

A sales representative for Data Electronics earns a salary of 1314 dollars per month plus a commission based on the total value of her sales. If she earned 1484.40 dollars for the month and her sales totaled 5680 dollars, what is her rate of commission?

**Math**

The new container of Mootastic ice cream was reduced by 8% so that the new calories count is 410. How many calories were in the old container?

**Math (probability)**

Could someone please correct my work. A fishing magazine collected data and printed the following results: If there is rain then the probability of catching a fish at Lake Blue is 80%, but if it doesn't rain then the probability of catching a fish at Lake Blue is 17%. The ...

**Math**

the first term in the sequence is 256. after the first term, each term is multiplied by two amd then divided by four. what is the value of the 9th term

**MATH PRECAL HELP**

Business. The profit, in thousands of dollars, for a product is p(X)=-x^2+140x-4700 where x is the production level in hundreds of units. Find the production level that maximizes the profit. Find the maximum profit. The maximum profit of $ _____ is achieved when ______ units ...

**Math**

The odds of Macy passing her driver's test on the first try are 17:27 Determine the probability that she will pass her drivers test A. 1.588 B) 0.614 C) 0.630 D) 0.386 Is it C? (0.17 x 0.27)

**Math**

The ratio of the amount of money Jason had to the amount of money Wilson had was 12:13. After Wilson spent $63, Jason had 3 times as much money as Wilson. a) How much money did Jason have? b) How much money do they have altogether?

**Math**

If P(A) = O.41 then P(Ā)= Which one is the correct answer?I can't figure it out 0.59, 1.00, 0.26, 0.82

**math**

Jim’s pool is the shape of a rectangle. The length is 6 m less than three times the width, and the perimeter is 68 m. Find the dimensions of the pool.

**Math**

Five red balls and seven green balls are placed in a bag. Each ball is unique. A person selects 5 balls from the bag. What is the probability that all 5 balls are red? A) 1 B) 1/792 (This is a fraction) C) 1/396 (This is a fraction)

**Math**

Teaghan plays basketball. She scored 18 of her 20 last free throws. ___ A) What are her odds in favour of her scoring a free throw? ___ B) What are her odds against of her scoring a free throw? ___ C) What is the probability of her scoring a free throw?

**Math**

Round 156.29 to nearest tenth and hundredths

**Math**

On a given blueprint, 1 inch = 30 feet. If the dimensions of a meeting room on the blueprint are 1.5 inches x 1.25 inches, what are its actual measurements?

**Math**

Choose a room you would like to decorate: _My Bed room___________________________ Measure the length of one wall in inches: ___72_______________________ 2. Choose a size of paper to use. *I recommend just using a standard 8.5 inch by 11 inch piece of paper. Then fold it ...

**4th grade math**

I am a 3 digit number. The digit in the hundreds place is 4 times the digit in the ten place. The digit in the ones place is the sum of the digit in the hundreds and ten places. If the digit in the hundreds place is 4, what am I?

**Math**

A game has 30 cards numbered 1 through 30. e cards are shu ed. one card is picked at random. Find each probability. Which cards would give a probability of 1/10 they were picked.

**math**

A nurse has a 30% alcohol solution and an 80% alcohol solution. He needs 10L of a 40% alcohol solution.

**math**

1.Find the value of this fraction computation: 6(1/2 + 2/3+3/4) Calculation With Distribution (Show all steps.) Calculation Without Distribution (Show all steps.) 2.Find the perimeter of a rectangular area with a length of 13 inches and a width of 7 inches. Calculation With ...

**math**

in a rational number... nemerator is 3 less than the denominator. if 3 is added to the numerator.. fraction becomes 1. find the fraction??

**Math- Need Help..**

I'm having trouble with a question from one of my math assignments and it's driving me crazy. Its: -2/5x - 9 < 9/10 (two-fifths and nine-tenths) I tried doing it a few times, it might be easier than it looks and I just don't understand. If someone can help, that would be ...

**math**

I am prepping for a mid-term. A deep sea diving bell is lowered at a rate (constant). After 10 min, the bell is at a depth of 300 ft. After 30 min the bell is at a depth of 1400 feet. What is the ave. rate of lowering per minute? Thanks

**math**

okay so I have two questions that i'm completely stuck on ;-; 1.You want to buy three books that are on sale at 20% off. The original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation With Distribution (Show all steps.) Calculation Without ...

**math**

Use the Distributive Property to expand the expression –3(6.3x + 1.5y).

**Math**

Explain how you know to use a variable in an addition or subtraction expression

**math**

An urn contains 10 red balls, 6 green balls, 15 orange balls, and 14 blue balls. If one ball is randomly drawn from the urn, what are the odds against the ball being red? State your answer as a ratio using a colon to separate the two numbers.

**Math**

A photographer changers a sitting fee of $15for each pose writte a function to describe the situation find a reasonable domain and range for up to 5 pose

**Math**

Tia ran 2 and 7/8 miles. George ran 1 and 1/10 miles.About how many more miles did tia run than George? Place a star on the number line to show your estimate

**Math**

A page out of a magazine had a 15 by 15 sheet of 225 stickers. How many of these stickers are not on the border of the page?

**Math**

A green paint is created by mixing 3 parts of yellow with every 5 parts of blue. How many gallons of yellow paint are needed to make 44 gal of this green paint?

**Math**

What are addends

**Math**

The blueprints for a new house or scaled so that 1/4 inch equals 1 foot. the blueprint is the preimage and the house is the dialated image. The blueprints are plotted on a coordinate plane. A. What is the scale factor in terms of inches to inches?

**Math**

In angle DEF, d=13.5 cm, e=18.2 cm and F = 60 degrees Determine the measure of f to the nearest tenth of a centimetre. I know the answer is 16.4 cm but how do I get it

**Math**

How to find the average of decimals

**Math**

Matthew got 36 problems rights out of a total of 40 problems on a tes.wht percent of the problems did he her rights

**Math**

All planets revolve around the sun in elliptical orbits. Uranus's furthest distance from the sun is approximately 3.005 times 10 to the ninth power km, and it's closest distance is approximately 2.749 times 10 to the ninth power km. Using this information, what is the average ...

**Math**

Li cut a 6inch piece of string into pieces that are each 1/2 how many string did she get

**Math**

Each ounce of a substance A supplies 2% of the nutrition a patient needs. Substance B supplies 15% of the required nutrition per ounce, and substance C supplies 15% of the required nutrition per ounce. If digestive restrictions require that substances A and C be given in equal...

**math**

hOW can I solve this by elimination? I know how to solve by substitution but not elimination 3x – 2y = 0 9x + 8y = 7

**math**

how would I solve this using ELIMINATION not substitution -2x+3y=1 -4x+y=-3

**Math**

John is makeing a book and he use 228 digit how many page does he have

**Math**

So my question is find the circumference of the circle in terms of Pi then use the approximation 3.14 for pi and approximate the circumference. How would I do this? The radius of the circle is 2m.

**Math**

Hi, if anyone can help me with this problem I would greatly appreciate it. I understood all my other math problems except for this one. So if anyone could help walk me through the steps so I know for next time how to solve problems like this I would appreciate it :D. 1.Write ...

**Math**

Multiple Choice Choose the best answer. For questions 1–3, rewrite the expression using exponents. 4 × 4 × 4 × 4 × 4 A. 54 B. (My choice) 45 C. 44 ====== 3 × 3 × 3 × 3 A. (My choice) 34 B. 43 C. 35 ===== 10 × 10 × 10 A. 310 B. 101 C. 103 (My choice) ====== For ...

**Math**

1/11 x 3/9

**Math**

On a given blueprint, 1 inch = 12 feet. If the dimensions of a recreation room on the blueprint are 2 inches × 1.75 inches, what are its actual measurements? 1 ft x 12 ft 6 ft x 7 ft 22 x 18 ft 24 ft x 21 ft WHAT IS ANSWER HAVE NO IDEA PLZ!

**Math**

I am supposed to figure out what this rational function is by using these clues and I am a little confused. Can someone please explain how I do this? asymptotes: horizontal~none vertical~x=-4 slant~y=x+1 end behavior~ f(x) approaches infinity as x approaches infinity; f(x) ...

**math**

Paulo earns a salary of 15000$ per month for selling cell phones. He receives an extra 30$ for each cell phone over 100 units that he sells. How much will be make if he sells R cell phones? 50 cell phones?