# Posts by math

Total # Posts: 424

**Math**

A car dealer purchases 40 new cars at 6,500 each. He sold 40% of them at 8,000 each and the rest of them at 9,000 each. What is his total profit?

**math**

solve y=0.04x^2+8.3x+4.3

**math**

1.one more than 3 tens 2.one less than four times five 3.five added to six 4.successor of 28 5.two more than two times tens 6.the greatest 1 digit composite number 7.three added to three times three

**Math**

1. Use 3.14 for pie to estimate the area of a circle. The diameter is given. Round your answer to the nearest hundredth if necessary. (the diameter is 16.8) 2. Find the missing length. Round to the nearest tenth, if necessary. (7,19)

**Math**

Did John Cena ever do math? It doesn't look like he did..

**math**

Can someone please tell me what is the percentage of 19.24 from 14.00? I would like someone to give the formula of solving this. Thank You!

**algebra **

Suppose x can be expressed as a function of y by x = 5y ? 3. a. How can y be expressed as a function of x? b. What is the relationship between the slopes of the two linear equations? c. How do the x-intercepts and y-intercepts of the two equations relate?

**math **

round to the nearest hundredths 1.5.

**Math**

Two business partners, Ellen and Bob, invested money in their business at a ratio of 6 to 7. Bob invested the greater amount. The total amount invested was $260. How much did each partner invest?

**math **

what can * by -168 and adds to get 21.

**Math**

Is x+3=2y and x=2y-3 have infinitely solutions or one solution or no solution

**Math**

Thank you

**Math**

I am confused on this. Can anyone show me where to start on how to solve it? Given the cipher and function below, decode the following message: 14-2-21-9 10-20 7-22-15 Function: f(x)=2x-2 Cipher A=2, b=4, c=6, d=8, e=10, f=12, g=14, h=16, i=18 j=20, k=22, l=24, m=26, n=28, o=...

**Math**

Construct a right triangle having hypotenuse of length 5.6 and one of whose acute angle measure 30

**MATH**

The grocery store parking lot is shaped like a parallelogram. Mr.Campbell is paving the parking lot.The area of the parking lot is 6x^2-3x-3m^2. what are the measures of the height and base of the parking lot. i did 3(2x^2-x-m^2) as my first step but now i am confused.

**Math**

write a function rule for the area of a rectangle or picture frame that has a width of 22 in less than its length use the function rule to find the area of the picture frame the length is 39 inches

**Pam**

How to find the vertex ? f(x)= x^2-3

**Pam**

What is the horizontal asymptote? y=x^2+11x+16/x+8

**Math**

The volume of seed in a bird feeder is represented by the equation V = 12(24-h) Q: Make a table of ordered pairs (h,V)

**Math**

But how did you get 3/16?

**Math**

Thanks!

**Math**

A meteorologist predicted that the downtown area would get 16 inches of snow in a snowstorm. The downtown area ended up getting 13 inches of snow. What was the percent error of the prediction?

**Algebra **

Use the figure to answer questions 1-3 file:///C:/Users/Student/Downloads/642756-212012-25329-PM-1227809791%20(1).png 1. Name a pair of complementary angles. ?1 and ?4 ?1 and ?6 ?3 and ?4 ?4 and ?5 2. If m ?1 = 53°, what is m ?4? 53° 43° 37° 27° 3. If m ?1...

**math**

One half a number minus 6 is 4 . What is the number?

**Math**

A class has 30 boys and 25 girls. what is the percentage of boys in the class?

**Algebra 1**

Thanks

**Algebra 1**

Suppose y varies directly with x, and y=25 when x=-140. What is the value of y when x=36 A)140 B)165 C)201.6***** D)176

**Emma**

Solve (?6+i)(?6-1)

**pre calc**

You have a sample of a certain radioactive substance. After two days, thirty percent of the sample has decayed. What is the half-life of the material and how much will have decayed after a week?

**physics**

An ideal gas has the following initial conditions: Vi = 490 cm3, Pi = 5 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3?

**2nd grade math**

Please help. I'm confused here's an example: 38+45=? Show how to make one added the next tens number?

**Plane Trigonometry**

tan A=-4/5;A in Quadrant 2 and cos B=-5/13: B in Quadrant 3. What is the exact value of the expression cos(A+B)?

**physics**

Given that the carbon atom has a mass of 12 amu, how many carbon atoms are there in a diamond with a mass of 8 g? ....atoms

**math**

No idea

**math**

Find the value of K so that x^2-5x+k=0 has one root equal to 4.

**Math**

A glass containing 250 mL of 80% iodine solution tips over spelling part of its contents. This subsequently replaced by an amount from a mixture of 40% iodine. If a 72% solution is resulted, how much was spilled?

**Math**

How many kg of pure salt must be added to 8 kg of a 30% solution to obtain a 35% soltution?

**Aria**

If a projectile is shot vertically upward from the ground with an initial velocity of 100 ft per sec, neglecting air resistance, its height s (in feet) above the ground t seconds after projection is given by s= -16t^2 + 100t a) After how many seconds will it be 50ft above the ...

**pre-calc**

|2x+1| greater than or equal to |x-3|

**Pre-calc**

I trust Steve

**Pre-calc**

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

**pre-calc**

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

**pre-calc**

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

**pre-calc**

We use the same polynomials as in the first question. Suppose that 3x^3 + 2x + 1 = (ax^2 + bx + c)(x+2) + d. Then b is equal to:

**Pre-Calc**

A force, F, on a body of mass m causes the body to accelerate. Denote the acceleration of the body by a. The relationship between force, mass, and acceleration is F = ma. If we take the unit of mass to be a kilogram, the unit of distance to be a meter, and the unit of time to ...

**pre-calc**

The force, F, between two bodies of mass m1 kilograms and m2 kilograms whose centers of mass are a distance of r meters apart is given by the formula F = (Gm1m2)/ r2 where G is the gravitational constant of the universe. What are the units of the gravitational constant G?

**pre-calc**

The radius of the earth is approximately 4,000 miles. The acceleration due to gravity is approximately 32 feet per square second. The mass of the earth is approximately 6 × 10^24 kilograms. Calculate the value of G in units of kilograms, meters, and seconds.

**Math**

In a particular year, a total of 63,172 students studied in two of the most popular host countries when traveling abroad. If 7306 more students studied in the most popular host country than in the second most popular host country, find how many students studied ...

**Pre-calc**

Problem 1. Suppose x > 0. Simplify the expression [(x+h)^1/2− (x) ^1/2]/h . For what values of h is this expression defined?

**Math**

Alice paints at a rate of 10 square feet per minute and Bob paints at a rate of 8 square feet per minute. If they work together, how many square feet can they paint per minute?

**Math**

Write out the full question please

**jay**

The formula for the perimeter of a rectangle is P=2(l+w)P=2(l+w). Solve for w. w=2P−lw=2P−l w=p2−lw=p2−l w=p−l2w=p−l2 w=P2+l D?

**math**

54, 63 , 72

**jay**

c?

**jay**

For a trapezoid, the following formula relates the area A, the two bases a and b, and the height h. A=(a+b)2hA=(a+b)2h Solve for a. a=2Ah+ba=2Ah+b a=2A−bha=2A−bh a=2Ah−ba=2Ah−b a=Ah2−b

**geometry**

The area of a triangle with sides 10,10,12 is __ sq. units.

**lin**

the product of the factors of 6

**lola**

how much bigger than -9 is -1

**Math**

I forgot to add that the boys and girls need to be in alternated seats

**Math**

If there are 5 boys and 7girls, in how many ways can 5 boys and 5girls sit in a round table? Is the ans : 5!*4!*7c5? Reason: since there are 5 boys so (5-1)! And left 5 seats for girls so 7c5 and within the girls theres 5 diffrent ones so another 5!

**maths**

Different ways of arranging 72 books in equal piles

**lauren**

$6300 is invested, part of it at 11% and part of it at 77%. For a certain year, the total yield is $565.00. How much was invested at each rate? how much was invested at 11% and 7%? thank you

**Ap series**

Sum of first six term of an ap is 46 ratio of its 10th term to that of 30th term is 1:3. Find its 13th term

**mathematics**

a1=1 ,an=3an-1+2 for n>2

**math**

6 red balls and 5white total 20balls how many yellow balls find probility

**Maths Year 10**

Q) the difference between two numbers is 5. A) if the larger number is k, what is the other number? B) write a simplified expression for the product of both numbers. ??? ty in adv.

**5th Grade Math - Urgent**

It's nothing. Because it's impossible. Lol so easy.

**Math**

Make a table and graph each quadratic function. Use integers from -3 to 3 for inputs. #4- y= -x2 #5- y=2x squared #6- y= -8x squared #7- y= x squared + 2 Make a table and a graph for each function. Use only positive values for x. #10- y= 10/x #11- y= 8/x Write a quadratic ...

**Math**

In a piggy bank Jane has 8 more quarters than dimes and she has 5 less nickels than dimes. Write an algebraic expression

**Math**

A only sixty percent of the people chose baseball B the reporter only talked to people at the baseball game C only the people that the reporter talked to counted D the reporter did not say what sport other people chose

**Math**

In a piggy bank Jane has 8 more quarters than dimes and she has 5 less nickels than dimes. Write an algebraic expression

**Semia**

A circular sinkhole has a circumference of 75.36 meters. A week later, it has a circumference of 150.42 meters. a. Estimate the diameter of the sinkhole each week. The sinkhole is about ? meters the first week. The sinkhole is about ? meters the second week. b. How many times ...

**math help please**

An art teacher had a total of t markers. He gave an equal number of markers to each of 18 students and had 16 markers left over. Which equation could be used to find n , the number of markers each student received? A t = 18n B t = 34n C t = 18n + 16 D t = 16n + 18 Please show ...

**math**

a die is rolled in such a way that even faces are twice as likely to occur as the odd faces. what is the probability that a prime number shows up when rolled?

**algebra**

There are 6 students in a club. For a certain activity, 4 of the students need to form a separate group. How many ways can this group of 4 students be formed?

**Please help**

Write in terms of cos and sin function. cotx*secx I know cotx = cosx/sinx and sec x= 1/cos x. but how do i solve it?

**Math**

Thanks.

**Math**

Ms. Vellake loves to read. She read 522 hours in 29 weeks. If she read an equal number of hours each week, how many hours did she read each week?

**Math**

Using the table of values -2,-1,0,1,2, what would be the "Y" when given these set of equations? y= 3^ y= 2 ^ y = (1/2)^ the ^ is a tiny letter x exponent that we sub in with the table of values

**math**

The ratio of the ages of ramu and his sister is 3:4 . If the age of his sister is 36,how old is ramu?

**math**

97 - 88 = 9 9 + 88 = 97

**Math**

Use equal intervals to make a frequency table for the average number of movies per person. You do not need to show tally marks. Country Average Number of Movies Turkey 0.5 Japan 1.2 UK 1.3 Finland 1.3 Austria 1.5 Germany 1.8 Spain 2.2 Sweden 2.2 Denmark 2.2 Switzerland 2.5 ...

**Analytical Geometry**

1) How do you create a fractal? 2) How are midpoints,lengths,equations for circles used to generate the fractal (pattern in pinecone). 3) What are some special features of this fractal (pattern in pinecone)? Describe a specific application of fractals, such as a scientific ...

**Math**

A parking garage is changing its parking fees for a week long festival. The function below represents the cost to park in the garage as a function of time (days into the festival). Piece wise c(t) = 10; 0 <= t <= 2 10; 2 < t <= 5 7; 5 < t <= 7 a) What would ...

**Algebra 1**

There are 8 boys on a bus. Each boy has 8 backpacks. In each backpack, there are 8 big dogs. For every big dog there are 8 little dogs. How many legs are there in the bus?

**Math**

Find the inverses of each of the functions below algebraically. a.3y+5x=18 b.h(t)=−4.9(t+3)^2+45.8

**Math**

Find the inverses of each of the functions below algebraically. a.3y+5x=18 b.h(t)=−4.9(t+3)^2+45.8

**Sam E**

Let v(t)=t^2−3t be the velocity, in feet per second, of an object at time t , in seconds. (c) What is the meaning of the quantity v(4)? Select all that apply if more than one statement is correct. A. In how many seconds will the object have moved 4 ft. B. The object'...

**Math**

How do you do 4ln(2x+3)=11

**math**

find the area of right traingle of base 1.2m and hypotenuse 3.7.

**probability distribution**

A bag contains Six blue and 4 red balls ,3 balls are drawn at random with replacement what is expected no of red balls that can be drawn?

**geet**

in 1996, sharon that spent 189 days in space that is longer than another astronaut. how many weeks was she in the space .

**math**

my answers are A)d B)b C)d and I don't know about D

**math**

how many different numbers of 8 digits can be formed from the digits 0,1,2,3,4,5,6,7 that are divisible by 5?

**optional math**

In the given figure, ABCD is a trapezium where AB // DC. P & Q are the midpoints of AC & BD. Prove that: Vector PQ= 1/2(Vector AB - Vector DC).

**Algebra**

If the angles of triangle are in the ratio of4:1:1then find the ratio in the smallest side / perimeter of the tringle

**math**

Tan45

**algebra**

ITS SO OBVIOS ITS -2.1 BECAUSE THE MATHEMATICAL GANJA EQUATION HELPS. THE BEST ANSWER IS OBV THAT BC 3248.,123

**co-ordinate**

Please help me to solve this:find the equation to the circle circumscribing the quadrilateral formed by the straight lines, 2x 3y=2, 3x-2y=4, x 2y=3 and 2x-y=3

**Finance**

You have a balance of $12,000 for your tuition on your credit card and you make no further charges. If your APR is 16.7% and each month you make only the minimum payment of 2% of your balance, then find a formula for the balance after t monthly payments. A. 12,000(0.966362)t B...