Sunday

February 26, 2017
Total # Posts: 105,648

**pre calculus**

can you check my work Find two different sets of parametric equations for the given rectangular equation: y=x^2+10 answer: x=t y=t^2+10 x=t^3 y=t^6+10

*December 12, 2016*

**Calculus**

(a) Compute the area of the bounded region enclosed by the curve y = e^x, the line y = 12, and the y-axis. (b) How does this area compare with the value of the integral ?1-12(ln x dx)? Explain your answer. (A picture may be helpful.)

*December 12, 2016*

**precalculus**

graph r = cos 5? + n cos ?, 0 ? ? ? ? For the integers n = -5 to n = 5. I do not understand this question at all. Can you use a similiar example to explain how I would solve this question?

*December 12, 2016*

**precalculus**

for the question graph r = cos 5? + n cos ?, 0 ? ? ? ? For the integers n = -5 to n = 5. Does this mean that -5,-4,-3,-2,-1,0,1,2,3,4, and 5 are all on the same graph? I really do not understand polar graphs any help would be much appreciated.

*December 12, 2016*

**pre calculus**

How would I graph r = cos 5? + n cos ?, 0 ? ? ? ? For the integers n = -5 to n = 5. ?

*December 12, 2016*

**Science**

A 1750 kg van is travelling down a 10 degrees inclined road at a speed of 6 m/s. If the driver brakes suddenly causing the wheels to lock, determine the distance L his tyres will skid on the road. The coefficient of kinetic friction between the wheels and the road is ?k=0.5. (...

*December 12, 2016*

**science**

teri aesi ki tesi

*December 11, 2016*

**science**

A 12m tall tree to be photographs with pin hole camera it is situated 15 m away from camera how far should screen place from pin hole camera to obtain 15m tall image of tree

*December 11, 2016*

**math**

if Mindy has a 20 minute walk to school and she stops for a hotdog that takes 5 minutes to cook how long will it take for her to get to school?

*December 11, 2016*

**physics**

a force of 400 N at an angle of 15 degrees above horizontal is needed to pull a 180 kg trunk across the floor at constant speed. what is the coefficient of kinetic friction between the trunk and the floor

*December 11, 2016*

**Physics**

A force of 400 N at an angle of 15 degrees above the horizontal is needed to pull a 180 kg trunk across the floor at constant speed. What is the coefficient of kinetic friction between the trunk and the floor?

*December 11, 2016*

**Algebra**

The base of a triangle is 3 inches less than twice its height If the area of the triangle is 126 square inches what equation can be used to find h the height of the triangle in inches A. 2h^2-3h+63=0 B.2h^2-3h-63=0 C.2h^2-3h+252=0 D.2h^2-3h-252=0 I think it's D?

*December 11, 2016*

**precalculus**

can you check my work Given: r = 4/-2-6sintheta What is the eccentricity of the function? r = 4/-2-6sintheta r=4/8sin theta r=2sintheta the eccentricity is 2

*December 11, 2016*

**Algebra**

I got 4i square root of 8 over 4 So is the answer c

*December 11, 2016*

**Algebra**

HOw do i apply quadratic if there isnt a b

*December 11, 2016*

**Algebra**

After it says choose the correct solution(s) x=-8 x= plus or minus square root of 8 x= plus or minus2isquareroot of 2 x= plus or minus8i

*December 11, 2016*

**Algebra**

Name two ways to solve for y=2x^2+16

*December 11, 2016*

**precalculus**

what is the formula for finding the distance between the pole and the directrix?

*December 11, 2016*

**precalculus**

what is the formula for finding the eccentricity of r=4/-2-costheta and can you explain how to use it?

*December 11, 2016*

**precalculus**

can you please explain how you determine the type of directrix a conic has?

*December 11, 2016*

**precalculus**

can you please explain how to find the distance between the pole and directrix?

*December 11, 2016*

**precalculus**

can you explain how you find the eccentricity of r=4/-2-costheta?

*December 11, 2016*

**Geoemtry**

The two x's inside the center frame

*December 11, 2016*

**Geoemtry**

A picture frame has a square picture in the center of the frame, the top and bottom borders are each 2 inches wide and the left and right borders are each 4 inches wide. What is the value of x if the total area of the picture frame is 65.25 inches

*December 11, 2016*

**interior decoration**

Which one of the following fabrics is most suited to a formal setting? A. Silk C. Cotton B. Wool D. Linen

*December 11, 2016*

**Algebra**

How do you get that

*December 11, 2016*

**Algebra**

-12greater than or equal to x^(2)+8x

*December 11, 2016*

**algebra**

Write the equation of a line that is perpendicular to the line x = -5 and passes through the point (-3,-7)

*December 11, 2016*

**algebra**

Ms. Easty picked up 3 doughnuts and 4 coffees and paid $4.91. Mrs. martin picked up 5 doughnuts and 6 coffees at the same shop and paid $7.59. How much did 1 doughnut cost? How much did 1 coffee cost?

*December 11, 2016*

**algebra 1**

(-5,-7)????

*December 11, 2016*

**algebra 1**

Write the equation of a line that is perpendicular to the line x = -5 and passes through the point (-3,-7)

*December 11, 2016*

**Chemistry**

Why do carbonated beverages go "flat" when opened and left and room temperature and pressure?

*December 11, 2016*

**Chemistry (PLZ HELP)**

State why you think clothes might be important to clean in hot water. Is it because it has to do with solubility or something?

*December 11, 2016*

**math**

Write the formula for the volume of a rectangular prism, and the formula of a pyramid. And then add both of them together, first by figuring out how many sides the milk carton has and all that

*December 11, 2016*

**algebra 1**

A rectangular piece of cardboard has a perimeter of 88 cm. The length of the rectangle is 8 cm longer than three times the width. Find the length and width of the rectangle.

*December 11, 2016*

**algebra 1**

Clay Thompson scored 38 points in one game. He made both 2pt shots and 3 pt. Shots. He scored a total of 16 times. How many 2 pt shots did he make and how many 3 pt shots did he make?

*December 11, 2016*

**algebra**

Clay Thompson scored 38 points in one game. He made both 2pt shots and 3 pt. Shots. He scored a total of 16 times. How many 2 pt shots did he make and how many 3 pt shots did he make?

*December 11, 2016*

**algerbra**

What value of X makes 11 the square root of 37x equal to 44 the square root of 37 ?

*December 11, 2016*

**math**

Clay Thompson scored 38 points in one game. He made both 2pt shots and 3 pt. Shots. He scored a total of 16 times. How many 2 pt shots did he make and how many 3 pt shots did he make?

*December 11, 2016*

**algerbra**

For what value of X can the expression Square root of 55X be further simplified?

*December 11, 2016*

**math**

8 feet

*December 11, 2016*

**Math equation**

I've won 556 games and tied 4 games and lost 228 games what is my percentage of wins

*December 11, 2016*

**math**

3/5 are girls,200 is no.of boys what is total no. of students

*December 11, 2016*

**Math**

Express in meters and centimeters 2.52cm

*December 11, 2016*

**Java programming**

Can you please post the full question

*December 11, 2016*

**Physics**

Is screw a modified inclined plane?

*December 10, 2016*

**Geoemtry**

I know I use proportions but Im stuck

*December 10, 2016*

**Geoemtry**

I am given two triangles One triangle has side length of 4 and 2x+7 The other one has side length of x and 1. How do I find the lengths of the sides of these two similiar triangles

*December 10, 2016*

**Algebra**

I dont understand it bc I dont get the question Is it ax+by=x

*December 10, 2016*

**Algebra**

Find the multiplied standard form of the quadratic ax+2+bx+c=0

*December 10, 2016*

**Algebra**

Solve algebraically x^2-6x+9>0

*December 10, 2016*

**Algebra**

The ratio of girls to boys in the robotics class is 3 to 4. If there are 27 girls in the club, how many members does the club have in total?

*December 10, 2016*

**Algebra**

A watermelon is dropped from the top of a building The height of the watermelon above the sidewalk is given by h(t)=-16t^2+240 with t representing number of seconds How many seconds does it take for the watermelon to hit the sidewalk

*December 10, 2016*

**Algebra**

A ball is dropped from a 50 meter cliff and its height, h is above the ground at any time, t is given the equation h(t)=50-4.9t^2 How long is the ball in the air before it hits the ground

*December 10, 2016*

**algebra**

127.5?

*December 10, 2016*

**algebra**

The base of a triangle is 3 inches less than twice its height If the area of the triangle is 126 square inches what equation can be used to find h the height of the triangle in inches

*December 10, 2016*

**Algebra**

When I type it into a calculator online it says it is no solution but I am confused on why that is First thing I did was add 10 to the other side so I got -63 Then I did 9|r-2|<-63 or 9|r-2|<63 Next I divide 9 and got -7 on one and 7 on the other and then added 2 so I ...

*December 10, 2016*

**Algebra**

9|r-2|-10<-73 r<-5 r<9

*December 10, 2016*

**Algebra**

40t-5t^2

*December 10, 2016*

**Algebra**

a projectile is laucnhed from the ground level and its height can be modeled as a function of time by the equation h=4-t-50t^2 What are the reasonable domain and range of this problem

*December 10, 2016*

**Check Answer!! math**

A test was given to a group of students. The grades and gender are summarized below A B C Total Male 7 14 11 32 Female 15 13 16 44 Total 22 27 27 76 If one student is chosen at random from those who took the test, Find the probability that the student was male GIVEN they got a...

*December 10, 2016*

**Algebra**

A projectile is launchedf rom ground level and its height can be modeled as functions of time by the equation h=40t-5t^2 What are the reasonable domain and range of this problem situation

*December 10, 2016*

**Algebra**

x^2-12x=-36 I got x=-6

*December 10, 2016*

**Algebra**

How long is the ball in the air before it hits the ground

*December 10, 2016*

**Algebra**

a ball is dropped from a 50 meter cliff and its height h above the ground at any time ti is given by thte equation h(t)=50-4.9t^2

*December 10, 2016*

**Math**

1. For a particular year, a company has gross annual income of $780,000, annual expenses of $270,000, and allowed depreciation of $60,000. The company is located in a state where the first $200,000 corporate income is tax-free, and any income above that is taxed at a State ...

*December 10, 2016*

**Algebra**

In the mall you receive a coupon for 5 dollars off a pair of jeans. When you arrive at the store you find that all jeans are 25 percent off Let x represent the original cost of the jeans 18a.Write a function F(x) that represents the effect of your original coupon 18b. Write a ...

*December 10, 2016*

**Algebra**

|1-4k| ? -11 Solve

*December 10, 2016*

**Algebra**

Can you PLEASE help me with this Algebra problem: In a hotel conference room, the number of chairs is 47 more than the number of people currently in the room. The total number of legs currently in this room is 938. What is the sum of the digits in the number of people ...

*December 10, 2016*

**Maths**

Mona's father is thrice as Mona after 12 years his age is just twice of his daughter find their present age?

*December 10, 2016*

**college statistic**

A study was done on skull sizes of humans during different time periods. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed? populations, and do not assume that the population standard ...

*December 10, 2016*

**Physics**

A cheeta can run with a speed of 29 m/s. Determine the distance travelled by a running cheetah in 8.6 s. D= 29/8.6 = 3.3s

*December 9, 2016*

**system of equations**

Write the system of equations as an augmented matrix. Then solve for x and y. 5x-3y=-34 10x?5y=?65

*December 9, 2016*

**Annuities**

You deposit $4000 each year into an account earning 6% interest compounded annually. How much will you have in the account in 30 years?

*December 9, 2016*

**Business Finance**

Calculate the present value, at an interest rate of 6% per annum, of a cash flow of $20,000 due in 25 years (to 2 decimal places).

*December 9, 2016*

**math**

for the first one is it 1/2b

*December 9, 2016*

**math**

i meant simplify

*December 9, 2016*

**math**

sorry i meant to just show how its supposed to be soled

*December 9, 2016*

**math**

1\frac{1}{5}m^{4?n}·0.5m^{n?6} this one also stumped me i can't find any way to solve it can you guys show me how to do it and give me the answer it would be real help! :)

*December 9, 2016*

**math**

(0.08b^{4m+8})\div (18b^{m?2}) this broil confuses me, can u guys plz show how its solved but not give me the answer

*December 9, 2016*

**precalculus**

Given: r = 4/-2-6sintheta What is the eccentricity of the function? ________________________________________ 2 -2 3 -3

*December 9, 2016*

**precalculus**

Convert to Rectangular: r*tan?/sec?=2 ________________________________________ y=2 y=½ x=2 x=½

*December 9, 2016*

**physics**

A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. What is the horizontal velocity component of the ball? Round the answer to the nearest tenth of a m/s.

*December 9, 2016*

**math**

find the length of the longest diagonal through a cuboid of sides 4cm by 13cm by 16cm. please show working

*December 9, 2016*

**philosophy**

Does one ever truly find happiness?

*December 9, 2016*

**Science**

the amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead. What is the independent variable

*December 9, 2016*

**Algebra**

The trail is 2493 miles long. It begins in city A and ends in city B. Manfred has hiked 2/9 of the trail before. How many miles has he hiked?

*December 9, 2016*

**Biochem**

Use the Henderson-hasselbach equation and solve for the ratio at each pH. Basic amino acids are histidine, arganine, and lysine.

*December 8, 2016*

**Math**

Still need help with this one: Find the work done in pumping the water over the rim of a tank that is 40 feet long and has a semicircular end of radius 10 feet if the tank is filled to a depth of 4 feet. I've set up an integral that is: 62.4 ? [-10,-4] 80 sqrt(100-y^2)(-y)...

*December 8, 2016*

**chem**

thanks i appreciate it

*December 8, 2016*

**chem**

They just tell me the eq pressure is 3 atm for the sample and ask for Keq. Here's the rxn... NH2COONH4(s) --> 2NH3(g) + CO2(g) Choices... A)4 B)1/27 C)4/27 D)27

*December 8, 2016*

**chem**

i feel like none of these answers are right. if the solubility of the solid is 'S' mol/ L, what is the Ksp of the product of the salt? Ca3PO42-(s) --> 3Ca2+(aq) + 2PO42- (aq) A)ksp=S^2 B)ksp=4S^3 C)ksp=27S^4 D)ksp=108S^5 Only leaning towards D because its the only ...

*December 8, 2016*

**Math**

Find the work done in pumping the water over the rim of a tank that is 40 feet long and has a semicircular end of radius 10 feet if the tank is filled to a depth of 4 feet

*December 8, 2016*

**Language Arts**

This is dumb your not explaining to her the reason and emotion. Your only confusing her.

*December 8, 2016*

**language**

How is barrio boy and a days wait include nonfiction and fiction

*December 8, 2016*

**chemistry ksp**

i feel like none of these answers are right. if the solubility of the solid is 'S' mol/ L, what is the Ksp of the product of the salt? Ca3PO42-(s) --> 3Ca2+(aq) + 2PO42- (aq) A)ksp=S^2 B)ksp=4S^3 C)ksp=27S^4 D)ksp=108S^5 Only leaning towards D because its the only ...

*December 8, 2016*

**Math**

100

*December 8, 2016*

**Math**

100 ft

*December 8, 2016*

**chemistry**

how do you calculate the equilibrium constant K for a reaction given only the equilibruim pressure for the sample...i thought u needed partial pressures for all substances involved. They just tell me the eq pressure is 3 atm for the sample and ask for Keq. Here's the rxn...

*December 8, 2016*

**math**

The number of employees at a plant continually fluctuates. One month started at 568. Then 102 employees were hired, and the next 57 employees were displaced. If the plant then plans to add 10% more employees, how many will it have?

*December 8, 2016*