Math

Recent Questions

math
the sum of a number divided by 4 and 5 is 2.

math help,,,,
solve the proportion 4/8 = w/32 w = 2 w = 7 w = 8 w = 16 i think its w = 2

Math
Solve the proportion W/36=5/18 A. W=5 B. W=10 C. W=15 *** D. W=20

Math
I have a set of complementary angles, the measure of one angle is 8 degrees less than the measure of the other. What is the measure of the larger angle? What is the measure of the smaller angle?

Math
The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This exaggerated feature has received various interpretations, such as being a refined adaptation for feeding. However, the large surface area may also be ...

math
In 2010 the birthrate in a certain country increases from 11*(e^(0.04*t)) million births per year to 16*(e^(0.04*t)) million births per year, where t is the number of years since January 1, 2010. Set up the integral and find the projected increase in population that would ...

Calculus 2 (math)
A factory installs new machinery that will save 1250−38x dollars per year, where x is the number of years since installation. However, the cost of maintaining the new machinery is 81x dollars per year. Find the accumulated savings that will occur before the machinery should ...

math calculus 2
Find the area of the region RR bounded by y=sin(x), y=cos(x), x=−π/3, x=13/6.

Math
Find the equation of the horizontal line that divides the area of the region in half y=18−x^2, y=0.

Math calculus 2
The revenue, in millions of dollars, for a company in year t is given by the function: R(t)=15*e^(0.08*t), 0≤t≤15 and the cost, in millions of dollars, to run the company in year t is approximated by: C(t)=12*e^(−0.04*t), 0≤t≤15 where t is the number of years after ...

Math
Akio and 7 friends will share 3 liters of juice equally. How much juice does each person get?

math
A student’s score on the first four mathematics tests of the year were 80, 95, 92 and 89. What must the student score on the fifth test so that the mean score for all five tests is exactly 90?

math
Kate is a salesperson. she sold a computer printer for 76.85 and earned 20% commission. how much commission did kate earn?

math
A scientist is working with 7 meters of gold wire. How long is the wire in millimeters?

Math (please help)
S is the midpoint of RT. Which of the following completes the statement? ST = 38 ft; RT = ? A)38 ft B)19 ft C)76 ft D)96 ft I'm not sure how to find the correct answer, can someone please help?

Math
It costs Luis $5 to park his car at a parking meter for 2 hours. What is the price to park for 1 hour? Write a word sentence to help you solve the problem. Then write and solve a multiplication equation. Please help me.

MATH help can anyone check my answer plzz!!
1)evaluate the function for x=2f(x)=7x-5 A)9 B)19 C)-9 D)-19 2)Candy is on sale for $0.75 each you have a coupon for $0.25 off your total purchase write a function rule for the coast on n pieces of candy. A)C(n)=0.25n-0.75 B)C(n)=0.75n-0.25 C)C(n)=1.0n D)C(n)=0.75n 3)The ...

Math
What data are represented by the stem-and-leaf plot below? 3)(7 8 9 4)(1 3 7 5)(2 4 Key: 4 | 1 means 41

Math
The local swimming pool is having a contest and all students are welcome to enter. The pool officials want a new logo that has rotational symmetry with 120⁰ and 240⁰ as its angles of rotation. Draw an entry for the contest.

Math
Which of the following expressions is between 10 and 11?

Math :(
The scale of a map is 1 inch + 25 miles. How many miles does 1.25 inches represent? 25 miles 31.25 miles 62.5 miles 49.25 miles

Math
Why it is not possible to have 290 in an angle

Math
A pizza parlor divides a pizza into 7 equal slices. Each slice of pizza looks exactly the same. The pizza has rotational symmetry. What is the angle of rotation for the pizza?

Math
Mandy is making name tags in the shape of triangles. They all should be the same size. Explain how she can use a pattern to make 25 name tags. How does she know they will all be congruent?

Math
Nafi can row down a 20- mile stream in 2 hours and can return in upstream in 5 hours.What is his average rate,in miles per hour,for the entire trip? a.10/7 b.7/2 c.20/6 d.3 e.40/7

math
Mr. Bigelow's garden is a rectangle with dimensions x feet long and y feet wide. Its perimeter is 70 feet. a. Write a function to represent the perimeter of his garden. b. What are the x- and y-intercepts of the function? c. Does either intercept make sense as a solution for ...

Math
How is 1 an even number?

Math
An architect make a model of a building with a volume of 1440 cubic centimeters? The length of the model is 15 centimeters and the width is 12 centimeters. How many centimeters tall is the model

Math
If there was ever a small quantity of the Universe creating a multiverse up to 30 thousand light years away, does that mean that we the people are only 14.56 x 100^23 light years away? Keep in mind that we use the original equation e=mc^2 for light years.

Math
It cost $20 for a concert ticket plus an additional $5 processing fee. Let t represent the number of tickets sold and C represent the cost. Write a function rule. Please help

Math
Felton Riddle: Your son Felton is a student in a class of 6 children. His classmates are Aaron, Bert, Chester, Diego, and Elmer. Aaron is better than Chester. Bert is better than exactly three others. Chester is better than at least one other student. Diego is better than ...

math
Ray owns a gym and he needs equipment for a new workout class. He has two different options: • Lease equipment for $1100 per month. • Purchase new equipment for $24 000 which he will finance with a bank loan that charges an interest rate of 7.1%, compounded monthly. He ...

Math
Solve the equation 5m = 15 to find the number of miles that Lan jogged each day. Justify each step you take to solve the equation.

Math
Three factories Buka, Sakono and Rama produce sugar in one hundred kilogram bags daily. Buka produces three times as much as Rama. Sakono produced two times as much as Rama. If Sakono produces 500 bags, how many tones altogether do three factories produce daily?

Math
Write a multiplication equation with one variable and one fraction that has the solution 8.

Math
Elena wrote the equation 5x = 25. She wants to multiply 25 by 5 to solve it. Does this make sense? Explain why or why not, and then give the solution.

Math
How do you isolate the variable in 3x=9?

Math
Tina has 1/2 quart of iced tea. She pours the same amount into each of 3 glasses. Which equation represents the fraction of a quart of iced tea that is in each glass? Mark all that apply. A. 1/2 ÷ 1/3 = n B. 2 ÷ 3 = n C. 2 ÷ 1/3 = n D. 1/2 x 1/3 = n E. 2 x 1/3 = n F. 1/2...

Math help
Can someone please help me? I've been stuck on this for two days Leo is planning a trip with his friends by renting a bus. He found that the bus costs $75.50 for 5 people. If he is planning to go with 13 people and himself, how much money will Leo pay for the bus? How much ...

Math
There are 21 white cars in the parking lot. These cars represent 35% of all the cars in the parking lot. How many cars are in the parking lot?

Math
A bag contains: 5 red marbles 6 blue marbles 3 green marbles 4 black marbles 2 yellow marbles A marble will be drawn from the bag and replaced 100 times. What is the reasonable prediction for the number of times a green or black marble will be drawn?

Math
5 percent of x is 30 what is x

Math
Jason was hired to mow a lawn that covers an area of 2 3/4 acres it took him 4 1/8 hours to complete the job what was his unit rate and hours per acre you multiply the numerator and a complex fraction by the reciprocal of the denominator to calculate our unit rate involving ...

Math
Solve: 3/2 x - = 19

math
A display case of toy rings are marked 5 for $1. If Zach wants to buy 50 toy rings, how much will Zach spend (not including tax)?

math
A car that weighs 15,000 N is initially moving at 60 km/hr when the brakes are applied. The car is brought to a stop in 30 m. Assuming the force applied by the brakes is constant, determine the magnitude of the braking force

Math
Really Stumped on this one, any help would be great! Thanks! Find the exact value of cos 2x using the double angle formula. cosx=−2/13 cosx=-2/13 where π2 <x < π

Math
Express the following as a product containing only sines and/or cosines. sin9x−sin7x

Math
sin3x−sinx=0

Math
Write a list of steps that are needed to find the measure of ∠B. A line segment ACD is shown with triangle ABC drawn so that AC is the base of the triangle. Angle BAC is labeled with 72 degree sign, and angle BCD is labeled with 113 degree sign.

Math
NEED HELP NOW!! Which of the following ratios is equivalent to 12/15 a 4:5** B10:20 C 60 to 80 D 60/45

Math
PQRS in which PQ=PS=5cm RS=5.5cm angle p=90 degree and angle S =120 degree

Math
A car moving at a constant acceleration covers a distance within two point that are 80m apart in 7s, when it's speed at the 2nd point is 15m/s . what it is speed at the first point? Also what is the acceleration?

math
2(4x+3) a b ----------- ≡ (identically equal to) ------ + ------ (x-3)(x+7) x-3 x+7 (2(4x+3))/((x-3)(x+7)) ≡ a/(x-3) + b/(x+7)

Math
In a class, the probability that a randomly chosen student likes dogs is 0.72, that a student likes cats is 0.54, and that a student likes neither is 0.11. Find the probability that a student likes both dogs and cats.

math
Find the projection of the line 3x – y +2z – 1 = 0, x +2y – z = 2 on the plane 3x + 2y +z = 0.

math
A 1,000 kg self-driving car is traveling at 32 m/s toward a 3,500 kg self-driving pickup truck that is, in turn, moving at 11 m/s toward the car. What is the total momentum of the system of car plus truck? (Make sure to specify its direction.)

math
A falling boulder hits the ground at a velocity of 15 m/s, losing 1,200 kg m/s of momentum to the Earth when it stops. What is its mass?

math
What is the same sprinter’s velocity if she has a momentum of 400 kg m/s?

Math
A hippopotamus can stay under water for 15 minutes. A sea cow can stay under water y minutes. This is 11 minutes longer than one third the time a hippopotamus can. Write an equation and solve to determine how long the sea cow can stay under water.

Java Computer Science
So in math, a restriction can be set. For example 30<x<60. So I'm trying to do this in a Java else if statement. else if (x>30 && x<60) {, will that do the same thing. Because I did that in my program but I'm getting my desired output twice. I'm suspecting this is ...

math
whats the opposite of x^2, like instead of the little number being on top, its on the bottom whats it called and how do you type it

Math
Erica made a poster in the shape of a quadrilateral that has only one pair of parallel sides. Which of the following names the shape of Erica's poster? 1)square 2)rhombus 3)rectangle 4)trapezoid I think# 4

Math, Physics, and Science
What are the Fundamental Laws of Biology? How is it so different to the cultures of science itself? Explain in an equation or in a matter of writing.

Math
A circular dog bed has a circumference of about 72 inches. What is the diameter in inches of the dog bed to the nearest inch?

math
what is 80x547568-868+21

8th grade math volume
A square pyramid has a base side length of 40 cm and a height of 51 cm. What is its volume? v=a^2 h/3 is this correct? 40^2 x 51/3 = 27200 cm3 ????? thank you

Math Help!
1. What is the slant height for the given pyramid to the nearest whole unit? Pyramid base = 10 cm Height = 12 cm A. 7 cm B. 11 cm C. 13 cm D. 16 cm 2. What is the length of the diagonal for the given rectangular prism to the nearest whole unit? Legnth= 8cm Width= 3cm Height= ...

Math
Becky used 5 teaspoons of mustard to make 32 ounces of potato salad. How many teaspoons of mustard does she need to make 4 pounds of potato salad.

Math
Write the equations described below. a) an addition equation with one variable that has a solution of 3 b) a subtraction equation with one variable that has a solution of 2/3

Math
Marge said that she subtracted 20 from both sides of an equation to solve it. Kollin thinks that the equation she was solving could have been 6+t=20. Does Kollin's reasoning make sense? Explain.

Math
Tim said that to solve the equation x-2=9, he would have to subtract 2 from both sides of the equation. Is Tim correct? Explain.

Math
How do you isolate the variable in x+5=12?

MATH
Can somebody explain to me how 4sin2θ = (sinθ)^2 become 8sinθcosθ = (sinθ)^2 ?

Math
As you can see from my nickname, math and I don't have great history. That is why I would like someone to check my answer. Q: Samantha types 40 words per minute. How many words can she type in 8 minutes? My Answer: 320 How I got to this: This question wants me to do ...

MATH
Can somebody explain to me how 2(u^2)(sin2θ)/g = (u^2)(sinθ)^2/(2g) become 4sin2θ = (sinθ)^2?

math
Ms Desai has $18 000 to invest and is looking at GICs. • Option A: 5-year GIC at 2.45%, compounded annually. • Option B: 2-year GIC at 2.2%, compounded annually; reinvest funds in a 3-year GIC at 3.5%, compounded annually. Compare the future values of each option. Which ...

Math
Eric has a riddle: "I am thinking of a fraction that is equivalent to 2 5 25 and the numerator is 18 less than the denominator." What is Eric's fraction?Explain how you know Please tell me the answer or my grade is a 50 please tell me the answer

Math calculus 2
Find the integrating factor for the following differential equation (cos8x)y′+8(tan8x)y=4sec8x,0<x&​lt;Ï€/16.

Math calculus 2
A 17650 cubic foot room initially has a radon level of 870 picocuries per cubic foot. A ventilation system is installed that brings in 385 cubic feet of air per hour that contains 5 picocuries per cubic foot, while an equal quantity of the well-mixed air in the room leaves the...

Math calculus 2
A 500-gallon tank initially contains 200 gallons of brine containing 85 pounds of dissolved salt. Brine containing 1 pounds of salt per gallon flows into the tank at the rate of 44 gallons per minute, and the well-stirred mixture flows out of the tank at the rate of 1 gallon ...

math
There is a sudden growth of algae in a lake that kills other life in the water such that y tons of algae will be present after t weeks. The rate of growth of the algae is y′=ty+t and the initial amount of algae is 7 tons. How long will it take ...

math
In Purdue's Chemistry department, the chemists have found that in a water based solution containing 24 grams of certain undissolved chemicals, the rate of change of the amount of chemicals dissolved in the solution is proportional to the amount of the undissolved chemicals. ...

Math calculus 2
Pam owns an electronics store with storage capacity for 100 computer tablets. She currently has 90 computer tablets in inventory and determines that they are selling at a daily rate equal to 17% of the available capacity. When will Pam sell out of computer tablets?

Math
Suppose P(C|D) =0.59, P(D) =0.44, and P (D|C) =0.38. What is P(C) rounded to two decimal places? A) 0.42 b) 0.57 c) 0.68 d) 0.34?

Math
I am a bit confused on how I am supposed to round 9, 819 to the nearest square mile. I am stuck on this. Please help

math
A drum is 2/5 full.if 75 litres are required to fill it,what is the capacity of the drum?

Math
A circular track of diameter 1.4 M is spotted in the centre with 20 CM script border find the area of the strip portion of the rug to the nearest centimetre square

Math
Natalie picked 135 berries in 15 minuets if she continues picking at that rate how many total minuets will it take her to pick 486 berries

Math
Sally and Mercian each have some money,if sally spend$45perbday and mervin spent 15 each day,sally would have $120 left by the time mervin spent his money if sally spent$15each day,Marvin spent $45 each day,sally would have 1080 left by the time Marvin spent all his money how ...

math
Enrico invested money at 3.95%, compounded weekly, while Paul invested money at 3.95%, compounded semi-annually. After 3.5 years, each investment is worth $4000. Who made the greater original investment, and by how much was it greater?

Math
200 coins consisting of 10 centavo coins and 25 centavo coins are worth 95 pesos how many coins each kind are there? plsss i really need your help, it would be very well appreciated if you could help me on my homework. Thank you!

math
How do I get 5.83 as my answer from this 29.47x - 4.9x^2 = 5.3 answer key: x = 5.83

Math
Write a sequence of transformations that maps quadrilateral ABCD onto quadrilateral A''B''C''D'' My answer: Reflection across the y axis then translate 2 units down. I searched the question up to check the answer but everyones says Reflection across the y axis then translate 1...

math
The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6) (6,1)|(6,2)|(6,3)|(6,5)|(6...

Math
Police use the formula S = 2 √5x to determine the speed, S in miles per hour of a skid of length x ft. Determine the speed of a car whose skid length is: A) 45 ft B) 180 ft

Math
write the slope intercept form of the equation of the line with the following conditions. 19. passing through (4,-2) and (-8, -5). 21. passing through (-5,9) and parallel to 3x+y=1. 23. passing through (4,1) and perpendicular to 2x-y=8.

Math
If the house on a particular stretch of road are all the old numbers starting at 11, how many houses are there if the total all the numbers is 551?

math
Two vertices of a triangle are F (1, −4) and G(6, −4). List two possible coordinates of the third vertex so that the triangle has an area of 20 square units.

Math
After school, Pam skateboards directly from school to a skate park and then from the skate park to a game store. The skate park is 4 miles south of the school and the game store is 5 miles east of the skate park. What is the straight-line distance between the school and the ...

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