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August 27, 2014

Posts by Grace


Total # Posts: 369

Math
I really need help
October 4, 2012

BIS 245 lab
need help
September 27, 2012

physics
A passenger on a moving train tosses a coin with an initial velocity of (-2.25 m/s)x unit vector + 4.26 m/s)y unit vector (from the point of view of the passenger). The train's velocity relative to the ground is (11.5 m/s)x unit vector. (a) What is the minimum speed of the...
September 16, 2012

Math
There are 36 students in Mrs. Keaton's sixth grade class. If 5/12 of her students are girls, how many girls are in the class? Thanks :-)
September 11, 2012

math
al has twice as many baseball cards as frank and four times as many football cards as joe. the expression 2x+4y can be used to show the total number of baseball and football cards Al has. If the answer is y, then what is the question?
August 17, 2012

Math
a jar contains green,red,and blue marbles.The probability of choosing a blue marble is 1/3, the probability of choosing a red marble is 1/2,the probability of choosing a green marble is 1/6.If there are 12 marbles in the jar,and then three green marbles are added,what is the ...
August 15, 2012

Math
If x-2y-z=2,x-y+2z=9 and 2x+y+z=3,then z=?
August 13, 2012

Math
the cube has a volume of 8.If point x,the midpoint of AV is joined to point y, the midpoint of edge CD what is the length of the shortest distance from x to y?
August 8, 2012

Math
John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?
August 8, 2012

Math
John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?
August 8, 2012

Math
If the average of 10 numbers is 10 and the sum of five of the numbers is -25 what is the average of the other 5 numbers?
August 7, 2012

Math
A professional basketball team has won 50 out of the 75 games played so far.The team still has 45 games to play.How many of these games must the team play in order to have a season record of winning 60% of the games played?
August 7, 2012

math
If the surface area of a cube is 150e2 what is the volume of the cube?
August 6, 2012

Math
If x-1/3y=3, then the value of 3x-y-6=? a) 15 b) 9 c) 6 d) 3 e) 0
August 6, 2012

Math
Thank You
August 6, 2012

Math
oh i read the question wrong I got D
August 6, 2012

Math
i got E
August 6, 2012

Math
Brian rode his motorbike for 3 hours at 50 miles per hour and then rode the next 200 miles in 5 hours.What is the total distance he traveled? a)150 b)190 c)250 d)350 e)1150
August 6, 2012

Math
1)If a (theres a square)b is defined as the average of a and b, what is the value of 2 (theres a square) 4 (theres a square) 9? a) 3 b)5 c) 6 d)7.5 e) 18 2)If A=(r+s)F, what is the average of r and s when A=8 and F=2? 3) For the three numbers a,j,k, (a<j<k),the ...
August 5, 2012

Math
1) Mr.Anderson has 3 passenger seats in his car.He offered to drive some of the 5 members of his daughter's club to the movies. How many different groups of 3 passengers could he drive? 2) A jar has green and red marbles.If the ratio of green to red is 3:2,what is the ...
August 5, 2012

Math
Given (a+2,a-2)= a for all integers a, (6,2)= a) 3 b) 4 c) 5 d) 6 e) 8 The cost of a drive-in movie is $y per vehicle. A group of friends in a van shared the admission cost by paying $0.40 each.If 6 more friends had gone along,everyone would have paid only $0.25 each. What is ...
August 2, 2012

math
A certain store is selling an $80 radio $64. If a different radio had a list price of $200 and was discounted at 1.5 times the percent discount on the $80 model, what would its selling price be? a) $90 b) $105 c) $120 d) $140 e) $160
August 2, 2012

math
A certain printer can print at the rate of 80 characters per sound, and there is an average of 2,400 characters per page.If the printer continued to print at this rate, how many minutes would it take to print an M-page report? a) m/30 b) m/60 c) m/2 d) 2/m e) 60/m
August 2, 2012

Math
If point A is (-3,-2) and point B is (5,5) then what is the length of segment AB to the nearest tenth?
August 2, 2012

Math
The radius of the small circle A is one-half the radius of the large circle B.WHat is the ratio of the area of the small circle to the area of the large circle?
July 31, 2012

Math
If a line L with a slope of -2/5 passes through the points (5,0) and (x,-2) then what is the value of x?
July 31, 2012

Math
To the nearest tenth,what is the circumference of a circle with an area of 49pi?
July 31, 2012

Math
If Jack's house is 7.1 miles due north of the Senior Citizen Center and Belinda's house is 6.3 miles due west of it, then to the nearest tenth,what is the shortest distance between their houses?
July 31, 2012

Math
a square in a circle with a radius of 2 pi .What is the perimeter of the square?
July 31, 2012

math
13/225
July 30, 2012

math
What is the probability that a randomly selected three-digit number has the property that one digit is equal to the product of the other two? Express your answer as a common fraction.
July 30, 2012

math
if there are 10 more girls than boys in a club with 60 members, how many are boys?
June 28, 2012

math
35/27
June 25, 2012

Pre algebra
How do I solve Quadratic equations by factoring? (for example how would I solve n2 - 10n = -21 if I was supposed to get the answers 7 and 3?
June 7, 2012

Humanities
Explain the focus on the idea of natural law as an extension of human nature during the conclusion of the seventeenth century.
June 7, 2012

Math
Carl owe the workers 80hours pay 2 days at 8hours a day is 16 hours day (3)work only 4 hours Total hours work 20 " for 4 workers working 20 hours =20 X 4 =80 hours pay
June 7, 2012

Science
Please may you find a labeled diagram of a weather thermometer.
May 27, 2012

Math
How do you simplify products of radicals? Please help!
May 24, 2012

statistics
On an exam whose scores followed a normal distribution, a student's z-score was +2. What percentage of students scored better than he did? (Use the 68-95-99.7 Rule.)
April 25, 2012

noun
if two dices are tossed together, the probability that the product will be less or equal to 18 what?
April 24, 2012

Chemistry
Are hybridized orbitals used to explain the fact that the four bonds in methane are equivalent? If not, what is?
April 16, 2012

Chemistry
The pH of a 0.100 M solution of an aqueous weak acid (HA) is 4.00. What would the Ka for the weak acid be?
April 16, 2012

physics
tommy builds a human sling shot that has an elastic constant of 4000 N/m. He puts his little sister in it and pulls it back for 5 meters. How much energy does his 25 kg sister have as she leaves the sling shot and how fast is she flying?
March 27, 2012

maths
Please I want to know how many litres make a metric tone.
March 25, 2012

physics
How would one plug the gravitational constant into an equation? To be honest, I'm having a hard time with the idea of the gravitational constant in general, but I need to solve an equation for the circular velocity of a galaxy. I know I need to multiply the gravitational ...
March 8, 2012

6th Grade Math
Simon went to the store to buy new school supplies. Simon spent 1/4 of his money on pencils and paper and 1/2 of his money on a backpack. If Simon has $12.50 leftover, how much did the backpack cost?
March 4, 2012

Math
There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test?
March 1, 2012

Math
There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test? ****** This is how I slove the problem, but I stuck in ...
March 1, 2012

physical science
120ml of a solution whose concentration is 30g/ml was diluted with distilled water by raising its volume to 160cm3. Calculate the concentration of the new solution.
February 25, 2012

Algebra 2
did you ever get this answer?
February 21, 2012

math
I have a question. I think I'm wrong, so I want to ask if it's right. If I do 3/4 x 1 5/6 x 7/4 x (-2 3/8) would the answer be negative?
February 6, 2012

Math
Given h(r) = 1/(r + 2), find: h(x^2) + 1 Thank You
February 4, 2012

math
the chef at a restaurant bought 37 pounds of salad for $46.25. how much did she pay for 1 pound of salad
January 30, 2012

chemistry
9.5 g Butane + 34.0 g Oxygen = 43.5 Then 43.5 - 28.7 g CO2 = 14.8 That is the answer: 14.8 g
January 22, 2012

Precalc
An ellipse has this Cartesian equation: ((x-2)/5)^2 + ((y-4)/3)^2 = 1 Find the focal radius Find the eccentricity Write the parametric equations for the ellipse Transform into the form, Ax^2 + By^2 + Cx + Dy + E = 0
January 20, 2012

Precalc
A hyperbola has this Cartesian equation: -((x-2)/5)^2 + ((y+1)/3)^2 = 1 A. Find direction in which it opens. Horizontal? B. Find the coordinates of the center. I think it's (-2,1) or (1,-2)? C. Find the slopes of the asymptotes: m=+- ?
January 20, 2012

Precalc
The figure shows the pre-image and first iteration for a set of transformations. If the iterations are carried on infinitely, the resulting fractal figure will have dimension given by Dimension=(LogN)/Log(1/r) It tells me to find N and r... What should I be looking for on the ...
January 19, 2012

Precalc
Thank you so so so much! I've been stuck on this for hours!
January 19, 2012

Precalc
The figure shows a 10 x 10 square centered at the origin. The darker-shaded square is the image of this square, dilated by a factor of 0.8 and rotated about the origin by exactly the number of degrees, , so that its corners touch the sides of the parent square. The corners of ...
January 19, 2012

4thGrade Math
11/15 feet long per piece. Or 8.8 inches.
January 19, 2012

Precalc
For this matrice, [[0.9cos(-30), 0.9cos(60), 2] [0.9sin(30), 0.9sin(60), 4] [0, 0, 1]] What is the rotation (in degrees) and is it clockwise or counterclockwise? I think it's 30 degrees clockwise...Is that right?
January 19, 2012

Precalc
I think it's [[2,4,6,4] [4,5,4,1] [1,1,1,1]] Is that correct?
January 19, 2012

Precalc
Write a 3 x 4 pre-image matrix for a kite with the points (2,4) (4,5) (6,4) and (4,1)
January 19, 2012

Precalc
I have: A. vector n= 3*vector i + 2*vector j + 5* vector k B. vector v= 7*vector i + 10*vector j + vector k C. 52.46 degrees And I'm not quite sure for D...
January 18, 2012

Precalc
Given the plane 3x+2y+5z=54 and the points P0(6, 8, 4)[on plane] and P1(13, 18, 5) [not on plane] A. Find vector n, a vector normal to the plane B. Find vector v from P0 to P1 C. Find the angle between vector n and vector v D. Find p, the scalar projection of vector v on ...
January 18, 2012

Precalc
Is it just ((6/11), (9/11), (2/11)) ?
January 18, 2012

Precalc
Yeah, sorry about that. There's a diagram to it and I wasn't sure how else to explain it.
January 18, 2012

Precalc
A line in space has the vector equation shown here. Fill in the blanks to find the position vector to the fixed point on the line that appears in the equation: vector r=(5+(6/11)d)vector i + (3+(9/11)d)vector j + (7+(2/11)d)vector k vector v= _____ vector i + _____ vector j + ...
January 18, 2012

Precalc
Ah. Alright, I think I understand.
January 18, 2012

Precalc
Thanks so much!
January 18, 2012

Precalc
I wish I could say that's why I don't understand this problem. But sadly, I still don't get it. Haha.
January 18, 2012

Precalc
In the problem before it says r(x)= (x^5 - c^5)/(x-c) Maybe it's referring to that? Does that help?
January 18, 2012

Precalc
By appropriate calculations, show that: lim r(x)=5c^4 (x->c)
January 18, 2012

Precalc
If α, β, and γ are direction angles for a vector in three dimensions and cos α = 0.6 and cos β = 0.7, find cos γ
January 17, 2012

Precalc
Suppose vector a is 3 units long, the magnitude of vector b is 1 units and cos (θ) = -0.3, where θ is the angle between the two vectors when they are placed tail-to-tail. What does the inner product of vector a and vector b equal?
January 16, 2012

world history
The dominant political philosophy in the Qin Dynasty was legalism.
January 7, 2012

Precalc
At the point were a line intersects a plane [with the equation (24x+32y+40z=480) and three points of A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4)], the vector i-, vector j-, and vector k-coefficients of the line equal the corresponding values of x, y, and z for the plane. By ...
January 7, 2012

Precalc
Thank you (:
January 7, 2012

Precalc
Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.
January 7, 2012

Precalc
Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.
January 7, 2012

statistics
In 2005, about 233 million people in the United States were aged 14 or older. They consumed, on average, 2.23 gallons of alcohol per person. use scientific notation to estimate the total number of gallons of alcohol consumed by this age group.
November 23, 2011

Science
What do polar bears and automobiles have in common?
November 15, 2011

Math
Solve: ((10)/(x^2-3x+45))=x+1
November 13, 2011

Living environment
diffusion
October 27, 2011

Algebra 2 Problem
You own a computer store selling two types of laser printers. The first type,A, costs $141 and you make a $45 profit on each one. The second type,B, costs $110 and you make a $35 profit on each one. You expect to sell at least 100 laser printers this month and you need to make...
October 27, 2011

Physical Science
a 30 kg girl and a 25 kg boy face each other on a friction-free blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girls speed is __________m/s
October 25, 2011

environmental science
describe and compare total resource use per capita in developed and developing countries
October 21, 2011

math
in the month of May, ronald earned $4.36 in interest on his saving account. if his interest rate is 0.2%, how much money was in his account during the month?
October 18, 2011

Biology
Which internal organs of the fetal pig appear to have the greatest amounts of blood supplied to them? Why does this make sense?
October 17, 2011

Biology
Is the pancreas an exocrine or endocrine gland? Indicate the anatomical evidence on your fetal pig. What are its contributions to digestion and where are they added to the digestive tract?
October 17, 2011

earth
Which process could lead directly to the formation of pumice rock?
October 2, 2011

chemistry thank you
concentrated sulfuric acid has a density of 1.84 g/ml. calculate the mass in grams of 1.00 liter of this acid
September 27, 2011

physics!
The driver of a 1560 kg automobile traveling at 24 m/s on a leve, paved road hits the brakes to stop for a red light. determine the distance needed to stop the car if the coefficient of friction between the car tires and the road is .80 -one of the steps required of me to ...
September 23, 2011

algebra
how to figure 75% of 620
September 21, 2011

biology
explain why the synthesis of proteins, DNA and RNA requires energy. thanks :)
September 21, 2011

biology
thanks again!
September 21, 2011

biology
outline why energy is needed for each of these processes: a. the transport of sucrose in a plant b the transmission of an action potential along a nerve axon c. the selective reabsorption of glucose from a kidney nephron I'm not exactly sure how I'm supposed to answer ...
September 21, 2011

Biology
What are two major flaws in the Phylogenetic Tree System?
September 20, 2011

chemistry
thanks
September 15, 2011

chemistry
in emission spectrum which one has a highest frequency and highest energy is it blue red or violet? which one is the lowest?
September 15, 2011

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