# Math

## Recent Questions

**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)yâ€²+8(tan8x)y=4sec8x,0<x<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 yÃƒÂ¢Ã¢â€šÂ¬Ã‚Â²=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 ...

**math**

choose the correction for the angle

**Math- Algebra**

A mother wants to invest $15000 for her children's education. She invest a portion of the money in a bank certificate of deposit which earns 4 percent and the remainder in a savings bond which earns 7 percent. If the total interest earned after a year is $900 how much money ...

**Math**

A carpenter has several boards of equal length. He cuts 3/5 of each board. After cutting the boards, the Carpender notices that he has enough pieces left over to make up the same length as four of the original boards. How many boards did the Carpender start with?

**Math**

In a company, the men who do not wear glasses are thrice as many as the men who do, while the women who do not wear glasses are ten more than the women who do. The probability that an employee wears glasses is 3/10. If selected employee wears glasses, the probability that this...

**Math**

How to solve function question? Input | Output 0 | _ 1 | _ -2 | _ 5 | _ | 7

**Math**

Johnny spent 1/3 of his pocket money on sweets and 2/3 on fruits what fraction of his money did he spend?

**Math**

I am a 2 digit number. If you divide me by 5 then multiply by 2, the product is 20. What number am i

**Math**

Real Estate an office building purchased for $1, 200,000 is appreciating because of rising property values in the city. At the end of each year its value is 105% of its value at the end of the previous year. a. Use a recursive formula to determine what the value of the ...

**math**

Yuri has a rope 12 meters long. He cuts into pieces that are 2 meters long. What fraction of the rope is one piece?

**Math**

Without solving, explain how you can tell whether the solution to 0.5x= 10 is less than or greater than 1.

**Math**

The cancer Society is holding three charity events. They hope the average attendee for the three events will be between 500 and 540, inclusive. The attendance for the first two shows was 480 and 540. What possible attnedence numbers for the third event will allow them to reach...

**math**

A restaurant sells a coffee refill mug for $6.75. Each refill costs $1.25. Last month Keith spent $31.75 on a mug and refills. Write an equation you can use to find the number of refills that Keith bought.

**Math**

In a candy bar 132 calories are from sugar. There are 220 calories in the candy bar. What percent of the calories are from sugar? A. 60 B. 52 C. 56 D. 68

**Pre-algebra Math**

George is a salesperson in a jewelry store and earns $100 per week, plus 10% of his weekly sales. If George makes $425 in one week , what are his sales for that week? $5,250 $4,250 $4,000 $3,250***** I think its D but I'm not certain. Can someone please correct me if I'm wrong...

**Math**

1. which solid has a base that is a triangle and three lateral surfaces that are triangles? A) Triangular Pyramid *** B) Triangular Prism C) Rectangular Prism D) Rectangular Pyramid 2. A solid with at most one base cannot be which of the following? A) Cone B) Cube C) Pyramid...

**math**

What is the amount of sales tax owed on a $35 jacket if the tax rate is 6%

**math**

An object is dropped from a balloon 3600 feet above the ground. Find the time it takes to reach the ground if the height of the object is given by the equation h(t) = –16t^2 + 3600

**Math**

The length of a rectangle is three times as long as its width. Its area is 675 square feet. a. Write an equation that demonstrates the given information. b. Find the dimensions of the rectangle.

**Math**

You invested $1000 in a savings account in 6th grade. The account pays 5% annual interest. How much money will be in the account after 6 years? I understand how to set the equation up, but I'm not sure how to get the final answer. This is a question from my textbook that shows...

**Math**

You invested $1000 in a savings account in 6th grade. The account pays 5% annual interest. How much money will be in the account after 6 years? I understand how to set the equation up, but I'm not sure how to get the final answer. This is a question from my textbook that shows...

**math**

If, initially, there is 20 mg of gold-198 (198Au) (half-life = 2.696 days), how many days does it take for less than 1 mg to remain?

**Math**

1. Classify the triangle according to side length and angle measurement 2. Classify the triangle according to side length and angle 3. Classify the triangle with side lengths 4,4, and 4 4. Classify the triangle with the measuring 69,42, and 68, 5. Determine the best name for ...

**math**

How many times greater is the half-life of 24Na (15 hours) to that of 216Po (0.15 seconds) Half-time of 24 Na (15hrs) would be 54000 seconds while 216Po would be 0.15s. Because it says how many times *greater*, I opt to divide 54000 seconds by 0.15 seconds which would equal ...

**Math**

Using algebraic expression no arithmetic symbols. Twice the quotient of a number divided by 5.

**Math**

Six brothers share 5 sandwiches equally how much does each brother get

**Applied Math**

6 divided by 26 yd. 2 ft. 6 in. Please explain how you get this your answer if possible. Thank you in advance.

**Math**

Question if I was dividing this 3 divided by 16 lb. 5 oz.= 5ld.5oz.

**Math**

A rectangular solid 9 in.x 3 ft. x 8 ft. Answer in cubic feet.

**Math**

what is the volume of the solid obtained by rotating the region bounded by y=x^2, and y=5x about the line x=5 using the washer method and respect to dy?

**math**

definition of hypotenuse

**math**

How many different right triangles are there with a hypotenuse of length 5 cm?

**math**

How many different triangles with sides of measurements of 3, 4, and 5 are there?

**HIM math**

A total of 76,006 IP service days of care were given at University Hospital during this year. The bed counts changed from a count of 200 at the beginning of the year to 220 on March 15, and then to 230 on July 1. The count was reduced to 210 on November 15 and it remained at ...

**Math**

mr.hooper recorded the number of bags of candy sold at his store last week out of 54 bags of candy sold, 12 were cherry flavored based on these result how many bags of candy out of 36 can be expected to be sold that are not cherry 8 12 THIS ONE 28 18 2.Duncan wants to make an ...

**math**

83/55 + 93/50 can you give me the actual answer

**math**

The distance between Milltown and Summerville is 3.5 inches on a map. If the map scale is 1 inch = 20 miles, what is the actual distance between the towns? So 3.5*20=70. If it's 70 then it's in miles?

**math**

definition for linear

**math**

(3/4 divided by 3/100) divided by 3/2 x 1/2 + 7/6=

**math**

83/55 + 93/50

**math**

3/x=x/12 what is x

**math**

if eight times a number is increased by three the result is 19 more than six times this number. find the number

**Math**

1 inch is 400 miles If the actual distance from San Antonio to Houston is 200 miles which of the following should be the measure between the two cities? 1/8 1/4 1/2 1 My answer is C

**math**

Daisy is shipping a package to her daughter, Molly. If the box’s dimensions are equal and the length is 3 feet long, what is the volume of the box in cubic feet? A. 1 B. 3 C. 9 D. 27

**Math**

18. Levi earns $6.25 per hour working after school. He needs at least $143.75 for a stereo system. How many hours h does he need to work to reach his goal? (1 point) > 143.75; h > 23; 23 hours 6.25h ≤ 143.75; h ≤ 23; 23 hours *** < 143.75; h < 23; 23 hours 6....