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math
solve with addition: -3x + y = 3 2x- 3y = 5
MATH
John forgot to pay his $364.00 income tax on time. The IRS charged a penalty of 12% for the 55 days the money was late. Find the penalty that John paid. (Use a 365 day year.)
math
Barbara knows that she will need to buy a new car in 4 years. The car will cost $15,000 by then. How much should she invest now at 10%, compounded quarterly, so that she will have enough to buy a new car? Round to the nearest cent
Math
Solve by substitution: x + 2y =1 8x + 8y =4
math
-6x + 3 =-7 - 5x
math
The mass m(t) remaining after t days from a 70 g sample of thorium-234 is given by the equation shown below. m(t) = 70e-0.0274t Find the half-life of thorium-234. (Round your answer to the nearest tenth.)
math.
2. Factor these ---(3x^11z^5)^3 b. (3x^5)^ -3 / 2x-5(3y)^4 c.3x^5)^ -3 / 2x ^ -5(3y)^4 (same as b but - 5 is the exponent)
Math209
Selling shirts. If a vendor charges p dollars each forrugby shirts, then he expects to sell 2000 - 100p shirts ata tournament. a) Find a polynomial R(p) that represents the total revenuewhen the shirts are p dollars each. b) Find R(5), R(10), and R(20). c) Use a bar graph to d...
math
solve using the elimination method 0.05x+0.25y=11 0.15x+0.05y=12
math
How do you solve using the elimination method 0.3x-0.2y=4 0.5x+0.3y=-7/17
math
SOLVE USING SUBSTITUTION METHOD X+2Y =1 8X +6Y + 4
English
How do I start out writng a paragraph on a subject, Food Safety? * Subject: food safety * Occasion: aftermath of an outbreak of sickness at fast food restaurants due to tainted meat * Audience: FDA (agency that manages food safety) * Purpose: Persuade audience to do a better j...
math
0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination method
math
How do you solve using the elimination method 0.3x-0.2y=4 0.5x+0.3y=-7/17
math
Mr. Rosart selects two students from his class to present their book reports. He places the names of each student in a box and randomly picks one at a time. The class has 14 boys and 12 girls. What is the probability that the second name Mr. Rosart picks is a boy, if the first...
math
0.3x-0.2y=4 0.5x+0.3y=-7/17 Can anyone Please help me solve using the elimination system..... Someone tried to explain it but I still do not get it at all
math
Can someone help me solve the following....using elimination methods 1) 5x+7y=43 -4x+y=25 2)9x-9y=36 7y-3x=-14 I think the answers are would the answer to number 1 be (-4.26,1.52)? would the answer to number 2 be (-0.5,-6.5)? Can someone please verify or tell me what I did wro...
math
in 1995, the life expectancy of males was in a certain country was 70.7 years. In 2001, it was 74.3 years. Let E represent the life expectancy in year t and let t represent the number of years since 1995.
math
Can someone help me solve the following....using elimination methods 1) 5x+7y=43 -4x+y=25 2)9x-9y=36 7y-3x=-14
math
0.3x-0.2y=4 0.5x+0.3y=-7/17 Can anyone Please help me solve using the elimination system.....
math
a student chosen at random failed a driving test.
Math
Dalya received the proceeds from an inheritance on April 5. She wants to set aside enough on April 6 so that she will have $17,000 available on October 2 to purchase a car when the new models are introduced. If the current interest rate on 91- to 180-day deposits is 7.75% pa, ...
math
average of: 8; 10; 12; 14; 16
math
1) x+8y=33 -x+4y=3 I need help solving this one using the elimination method!
math
1) 6m+n=47 m-4n=12 can someone help me solve using substitution method?
math
can someone please help me with this elimination methods problem? 0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination method and give the ordered pair...
math
a card is picked from a pack containing 52 cards . it is then replaced and a second card is picked. Find the probability that a)both cards are the seven of diamonds, b)the first card is a heart and the second a spade. c)one card is from a black suit and other is from a red sui...
Math Help Please
A bottle contains 0.5 quart of grape juice. Keisha will use 0.2 of the grape juice to makie fruit punch. How much grape juice sill Keisha use for the fruit? I chose a.)0.3. My mom says it is b.) 0.2 The teacher's edition says it is c.) 0.1. Can you please explain how to wo...
math
in a group of 100 people, 40 own a cat, 25 own a dog and 15 own a cat and a dog. Find the probability that a person chosen at random a) owns a dog or a cat b) owns a dog or a cat, but not both c)owns a dog, given that he owns a cat d) does not own a cat, given that he owns a dog.
7th Grade Math
Find the area of the circle described. Use pi= 22/7. Diameter= 1.4cm Please help!
Math
Forest rangers use degree measure to identify directions and locate critical spots such as fires. A forest ranger at tower A observes smoke at a bearing of 149 degrees (clockwise from the north) while another forest ranger at tower B observes the same smoke at a bearing of 250...
math
what is the way to know what was Thales statement ?
math
Elimination Method....I am not understanding this method either and need some help here is what I am working on: 1) x+8y=33 -x+4y=3 2) 5x+5y=-7 7x-2y=13 3) 0.3x-0.2y=4 0.5x+0.3y=-7/17 Can someone please help me with these!
Math
Can someone help me solve the following problems using the substituion method? I need to find the ordered pairs and I do not get it.... Here they are 1) 6m+n=47 m-4n=12 2) 6x+4y=-10 -7x+y=57 3) 5x+7y=43 -4x+y=25
math
How do I convert 7/13 to a decimal then to a percent?
Math
Use the fact that (125)^1/3 = 5 and the tangent line approximation to estimate (123)^1/3
math
How do I convert 7/13 to a decimal then to a percent?
Math
Hi, I am doing a practice exam, and I came across this problem and I am have difficultly starting it. A UFO flies horizontally at a constant speed at an altitude of 15 km and passes directly over a tracking telescope on the ground. When the angle of elevation is pi/3, this ang...
Math
Solve using long division 0.5 ÷ 0.02
Math
Find the simple interest on a loan of $100 at an interest rate of 2% for 7 years.
Math
How do I find the derivative of sin^2(x) or written as sin(x)^2?
Math
Do you know where I can find a list of all the formulas? Like for volume of a cone, sphere, areas, etc?
math
x^2-8x+16
math
In a Gallup poll of 1,038 adults, 540 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful?
math
5 x (x + 2y) - (5x +2y) + y(2x + z) translate into a word phase.
math
Freddie Fast can make 6 4/5 chairs per hour on a furniture assembly line. Warren Weary makes 4 1/2 chairs per hour. In a 10-hour shift, how many more chairs does freddie make than warren? and if i may i would also like a small explanatation please i just done get it and thank ...
learn 49 math
a road trip has a scale of 5/8 inches for every 125 miles.. how many inches would be needed to represent 1000 miles on the map?
math
Short projectile motion question A German rocket from the second world war had a range of 3000meters reaching a maximum height of 1000meters. Determine the rockets maximum velocity
math
A balloon in the shape of a sphere is deflating. Given that t represents the time, in minutes, since it began losing air, the radius of the ballon (in cem) is r(t)=16-t. Let the equation V(r)= 4/3 pi r^3 represent the volume of a sphere of radius r. Find (V (open dot) r)(t)
maths
1. Sphere C(-2,1,-3), radius=7. T plane at (4,-2,-1)=? (a) 6x-3y+2z=0 (b) r.(6,3,2)=28 (c) 5x-3y-2z=28 (d) r.(6/7,-3/7,2/7) 2. Sphere (x-1)²+(y-5)²+(z-2)²=49 and planr r.(-2,-6,-3)=0 form which circle?(a) (x-1)²+(y-5)²+(z-2)²=19.53 (b) C(0,...
maths
The line r=(2,3,4)+µ(-1,0,3) and the point (6,0,2) form which plane: (a) r.(-1,0,3)=10 (b) r.(9,10,3)=60 (c) r.(2,3,4)=29 (d) r=(2,3,4)+µ(-1,0,3)+ù(6,0,2) Please help!!! Thanks!
Math
How would I find the formual of power function out of these 2 point? (5,75)(10,600)
math
Hey I need some help with this problem. Any ideas on how to solve it? Thanks lots. : A hardware supplier manufactures three kinds of clamps, types A, B and C. Production restrictions require them to make 10 units more type C clamps than the total of the other types and twice a...
math
one side of a right triangle has 2cm less than the hypothuse, and 7cm more than the third side what is the lenghnt of each side
math
A TV reporter said that twice as many woodlands were lost this year to fire than in the preceding year. He claimed this was an increase of 200%. Was he correct?
Math 10th grade
five marbles in a jar are green. the odds against choosing a green marble are "4:1" how many marbles are in the jar
math
How many liters are in 200 milliliters
math
What is the least common denominator of the rational expressions x-1/x^2+8x+7 and -3/x^2+x
Math
A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February 17 will settle the i...
Math
How do I show 33/100 = 1/3, step by step?
Math
How do you show 33/100 as a reduced fraction? The answer choice is suppose to be approximately.
math
A landscaping company sells 40-pound bags of top soil. The actual weight x of a bag, however, may differ from the advertised weight by as much as 0.75 pound. Write an inequality involving absolute value that expresses the relationship between the actual weight x of a bag and 4...
Math
Greg is opening a car wash. He estimates his cost equation as C= 5000 +0.05x and his revenue equation as where R=1.9x is the number of cars washed in a six-month period. Find the number of cars that must be washed in a six-month period for Greg to make a profit.
math
You roll 2 six-sided dice. Give the probability of rolling the total 2.
College Math!
A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February 17 will settle the i...
math214
Find 28° 29’ 46” - 16° 48’ 59’’
Math
solve the polynomial equation (x+5)(x+1)=45
math
Write the probability as a decimal,percent and fraction. C) has a "50-50" chance D) will happen about 3 times out of 4 E) has 2 chances in 3 of happening C)0.5,50%,50/N D)0.75,75%,3/4 E)0.66,66%,2/3 Thanks!:) PsyDAG Is my Answer correct?
Math!
A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February 17 will settle the i...
Math (Analysis)
Suppose that A has exactly three elements and B has exactly two. How many different functions are there from A to B? How many of these are injective? How many are surjective?
math
Geral and michelle went on a 24 bike-ride. By lunch time they had ridden 5 eigth of the total distance. How many miles did they have left to ride after lunch?
Math!
Pls help me on this, i dunno the answer but i got the answer of my own, but its wrong nad this paper is already marked, but i still cant seem to understand how to solve this! A furniture store bought an item for $810 less 15%. The store's expenses are 38% of the cost and t...
Math!
A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February 17 will settle the in...
Math (Geometry)
A rectangle has a perimeter of 12 m. If each side is a whole number of meters, what are the possible dimensions for the length and width? List them and explain your answer.
math_pre-calc
Find the equation of a circle that passes through the points (6,3) ans (-4,-3) and whose center lies on the line y=2x-7
5th grade Math
A rectangle has a perimeter of 12 m. If each side is a whole number of meters, what are the possible dimensions for the length and width? List them and explain your answer.
math (always)
if peter has 60 basball cards in his collection how many baseball football and basketball cards does he have? my answer was-20 baseball cards 10 football cards 10 basketball cards
Math 98 pre algebra
14 and 2/3 times 2 and 2/11 divided by 3 and 3/8. i got =234 and 1/4 am I correct and if not what is the answer?
math
peter bought a bag of candy. He gave away ten percent of the candy too his wife and the gave three pieces to meg. he gave one forth of what he had left to his friend joe and then ate half of the remaining 18 peaces of candy. How many pieces of candy were originally in the bag?
math 12 logarithms
I need to express log base 5 sqrt5 =0.5 in exponential form. Would it be 5^0.5 =sqrt5. I'm not really understanding this unit very well. Any explaination would be greatly appreciated.
math
1. Sphere C(-2,1,-3), radius=7. T plane at (4,-2,-1)=? (a) 6x-3y+2z=0 (b) r.(6,3,2)=28 (c) 5x-3y-2z=28 (d) r.(6/7,-3/7,2/7) 2. Sphere (x-1)²+(y-5)²+(z-2)²=49 and planr r.(-2,-6,-3)=0 form which circle?(a) (x-1)²+(y-5)²+(z-2)²=19.53 (b) C(0,...
math 12 logarithms
How would I go about proving 1/log a +1/log a = 1/log base 100 a. Any help would be greatly appreciate. Thanks
Maths
The line r=(2,3,4)+µ(-1,0,3) and the point (6,0,2) form which plane: (a) r.(-1,0,3)=10 (b) r.(9,10,3)=60 (c) r.(2,3,4)=29 (d) r=(2,3,4)+µ(-1,0,3)+ù(6,0,2) Please help!!! Thanks!
math
Lydia Rise us building a terraium and needs to buy two sizes of gravel and soil to go in the bottom. The terraiun is 24 in longs, 14 in wide, and 15 in tall. A.The bottom layer is pea gravel and needs to be 2 inches deep. How many cubic inches will she need? B. The second laye...
TRIG MATH
If sin theta= -7/8, then the value of 1/cot theta in the interval 3pi/2<theta is? okay I've done this question twice. The 1st time I got -7/sqrt15 and the next time got sqrt15/7. Are either of these right or am I totally messed??? I've got myself confused.
Math
Find the slope, if it exists. 60x-40y+15=0. I'm stumped on this problem Could someone please help.? Thanks.
math
Let {xn} be a sequence converging to á.? Suppose the errors en = |xn – á| satisfy en+1< or = Men^2en -1 for some constant M>0. What can be said about the order of convergence?
Math
Three planes: x+y-2z=1 2x+z=y-4 -3x-y+z=-2 They intersect at: (a) (-2/5,5,9/5) (b) no common intersection (c) r=(5/3,-2/3,0)+&(1,5,3) (d) r=(0,-4,-5)+%(1,5,3) &/%=signs like alpha and beta, used in vector eqns Please help! I just can't get the answer to be/ressemble any of...
Math questions
What are some examples of regular polyhedra? What are some examples of other important polyhedra? What characteristics help you determine whether a polyhedron is regular or irregular? How can you check for symmetry and rotational symmetry of polyhedra?
Math
Hi I need help figuring out these to word problems. Tom has created a scale drawing of his property for use in designing a landscape plan. 1 in on is drawing corresponds to 12 ft. There is a pond that is 112 ft. long on his property. How long will it appear on the drawing? Rou...
Math
Show that Euler’s formula holds for the polyhedra described in A right pentagonal prism
Math
Which uppercase letters of the alphabet have rotational symmetry?
math2
Solve the problem. You traveled 189 miles on 7 gallons of gasoline. At this rate, how many gallons of gasoline would you need to travel 297 miles?
Math
Differentiate in terms of x: 1] y = cos^3 5x 2] y = sec^2 3x
Math
A box has a bottom with one edge 7 times as long as the other. If the box has no top and the volume is fixed at V, what dimensions minimize the surface area? Please help me find the COMPLETE dimenssion of the box.
math
What is the height of an equilateral triangle that has sides of length 1 cm?
Math
A box has a bottom with one edge 7 times as long as the other. If the box has no top and the volume is fixed at V, what dimensions minimize the surface area?
Math
In 1920, the record for a certain race was 46.6 sec. In 1980, it was 45.4 sec. Let R(t)= the record in the race and t = the number of years snce 1920. a) Find a linear function that fits the data R(t) = b) Use the function in (a) to predict the record in 2003 and in 2006. 2003...
Math
The function W(d) = 0.112d approximates the amount in centimeters of water that results from d cm of snow melting. find the amount of water that results from snow melting from depts of 15cm, 26 cm, 70 cm
Math
In 1920, the record for a certain race was 46.6 sec. In 1980, it was 45.4 sec. Let R(t)= the record in the race and t = the number of years snce 1920. a) Find a linear function that fits the data R(t) = b) Use the function in (a) to predict the record in 2003 and in 2006. 2003...
Math
Write an equation of the line containing the given point and parellel to the given line. (2,-6); 9x-5y=4
Math(Please check)
Complete the identity secQ - 1/secQ = secQ Is this correct?
Chem hw!
1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas at 759 mm Hg pressure ...
Chem hw!
1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas at 759 mm Hg pressure ...
12th grade math
What is the distance between the origin and the point (5, 12)? If necessary, round your answer to two decimal places.
math 156
Describe two different ways that you could represent the number 0.80.
math
The volume of a rectangular prism is 2x^3+5x^2+x-2. The height of the prism is 2x-1, and the length of the prism is x+2. Find the width of the prism.
math
point c (2,1) is the midpoint of line segment ab. Find the coordinates of points a and b if they are both on axes. explain and justify your reasoning
math 116
After solving a system of linear equations, how can you check your answer to determine whether it is correct? Demonstrate the process of checking an answer with an example.
Math
If I have ((square root of 13)+(6))^2 would it be factored as -((square root of 13)+(6))((square root of 13)-(6)) or -((square root of 13)+(6))((square root of 13)+(6)) ?
Math 30
If cos theta = -sin theta,then sin^2 theta is what?
Math
Three questions, what is -7 3/10 - -4 4/5? -1 5/9 x -2 1/7? -12 divided by 1/3? How do you solve them?
math
solve 2/3 + 4/6
math
Give the dimensions of a picture frame that is a golden rectangle.
math
A graphics designer wants to use a star-shaped polygon with 10 points and a point angle of 12 degrees. What should be the dent angle of this polygon?
Math
Ted put several different integers in order from least to greatest. He then put the same integers in order from greatest to least. Both times the same n umber was third in order.
Math - Calculus
Show that the equation log y = 1.54 - .008x - .658 log x is equivalent to y = 34.7 (1.0186)^(-x) * x^(-.658)
2nd grade
2nd grade math measurement
Math116
Solve by elimination 5r-3s=13 3r+5s=69
Math 6th
Why do eskimos wash their clothes out tide? (can only be 10 letters)
Math(Please help)
1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
Math 30 Trig
For the equation 4 cos theta - sqrt12 =0, where 0< theta < or equal 2pi determine the measure of theta. One answer I got was 2pi/3, 4pi/3 and another time it totally different 5 pi/6, 7pi/6. Are either of these right if not HELP!
Math
Is there a difference between solving a system of equations by the algebraic method and the graphical method? Why or why not?
Math(Please help)
1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
Math
Solve the proportion x-4/9=x/18
math
4 times the sum of a and b
Mathtoo
what is the least common denominator of 3/5+1/3
Math
A juice mix requires the addition of 32 oz of water for every 12 oz of juice concentrate. How much juice mix may be made from 15 oz of concentrate?
Math
Consider the equation below. (Give your answers correct to two decimal places.) f(x) = 8sin(x) + 8cos(x) 0 ≤ x ≤ 2 (a) Find the intervals on which f is increasing. (Enter the interval that contains smaller numbers first.) ( , ) union ( , ) Find the interval on whic...
Math
Simplify: 1-m ——— m ————— m-1 — m
math
A $5,000 loan is offered for 18 months at 7.50% compounded quarterly. For full marks your answer(s) should be rounded to the nearest cent.
Math 157
five numbers are to be picked, without repetition from 44 numbers to determine the winner of the fortune five game in the state lottery. If the order of the numbers is insignificant how many different ways can a winning quintuple be seleted? what is the probability of winning?
math
josh buys concert tickets worth $180, he then keeps 2 of the tickets and sells the rest for 9 dollars more, he make a total profit of $36, after selling all the tickets. what was the original ticket price? howmuch people bought the ticket?
math
Short math quadractic equation word problem*best answer? josh buys concert tickets worth $180, he then keeps 2 of the tickets and sells the rest for 9 dollars more, he make a total profit of $36, after selling all the tickets. what was the original ticket price?
Math
Write 0.36 as a fraction.
Math
Two cards are drawn at random from a standard deck of 52 cards. What is the probability that both cards are queens?
Math
Find the first three iterates of the function f(x)=x^2-2,if the initial value is -2.
math logic
A group of five students needs to break into two smaller groups in order to tackle the two different assignments associated with a larger group project. Naturally, they feel that it would be most fair to break into groups of two and three. How many ways are there to do this? C...
Math
Find the probability of tossing exactly 2 heads on 3 tosses of a fair coin.
Math
How many ways can 9 keys be arranged on a circular key ring?
Math
Find P(5,2).
math
A set of data is normally distributed with a mean of 16 and a standard deviation of 0.03. What percent of the data is between 15.2 and 16?
math
Factor completely, or state that the polynomial is prime. 375x^3 - 192y^3
MATH
tan è = RISE OVER RUN, RISE IS 10 AN D RUN IS 6 tan è = 10/6 SOLVE è
Maths
if q>0, how can u use the graph of y =sin theta to draw the graph of y =sin theta +q?
MATH
CAN SOMEONE HELP ME WITH THIS PROBLEM HAT SIZE HEAD CIRCUM. HEAD CIRCUM- 7 1/2 20 3/5 60 X X 59 FOR THE FIRST X ROUND TO THE NEAREST EIGHT INCH. fOR THE SECOND X ROUND TO THE NEAREST FIFTH INCH AS NEEDED.
math
I have a couple of math questions that i cant seem to get to work out. can someone help me please.? 1.) (x/x+6)-(6/x-6)=(x^2+36)/(x^2-36) 2.) (r-2)-(2-r)=0 3.) add (8/ty^2)+(9/t^2y) 4.)add (7/w)+(8/w^2) 5.)add ((r+10)/r)+(r/(r+10)) 6.) divide ((z^2-1)/16z+16) / ((z-1)/4) 7.) f...
math
Factor using the formula for the sum or difference of two cubes. x^6 - 27y^3
math
Factor completely, or state that the trinomial is prime. 3y^3 + 15y^2 + 18y
math
1.Use factoring to solve the quadratic equation. x2 - 64 = 63x
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