Branches of Math
Recent Math Questions
The temperature in a room is changing at a steady rate. If x is the number of minutes since noon, the temperature was -4° C when x = -3 minutes and the temperature was 6° C when x = -5 minutes. Find the rate of change in temperature in degrees per minute. The answer is...
Thursday, February 5, 2015 at 5:33am
Two Lorries A and B ferry goods between two towns which are 3120 km apart. Lorry A traveled at km/h faster than lorry B and B takes 4 hours more than lorry A to cover the distance. Calculate the speed of lorry B
Thursday, February 5, 2015 at 1:05am
when a cold front move through, the temperature dropped at an average of 3 degree per hour.using a signed number find the change in temperature after six hours
Thursday, February 5, 2015 at 12:09am
A man walks directly from point A towards the foot of a tall building 240m away. After covering 180m, he observes that the angle of the top of the building is 45. Determine the angle of elevation of the top of the building from A.
Wednesday, February 4, 2015 at 11:51pm
A rock is thrown up in the air at 30 ft/second. It has height in feet given by H(t) = −16t 2 + 30t. When does the rock have a velocity equal 10 ft. per a second?
Wednesday, February 4, 2015 at 11:49pm
A factory whistle blows every 30 minutes. The clock tower chimes every 15 minutes. If they both sounded at 1:00 p.m., at what time will you hear them both at the same time again?
Wednesday, February 4, 2015 at 10:21pm
Two cyclists leave from an intersection at the same time. One travels due north at a speed of 18mph, and the other travels due east at 24mph. how long until the distance between them is 150 miles?
Wednesday, February 4, 2015 at 9:45pm
math 4th grade
Lance wants to find the total length of 3 boards. He uses the expression 3 1/2 + (2+ 4 1/2). How can Lance rewrite the expression using both the Associative and Commutative Properties of Addition?
Wednesday, February 4, 2015 at 8:57pm
Help solving one more question please!Mason spent $15.85 for 3 notebooks and 2 boxes of markers.The boxes of markers cost $3.95 each,and the sales tax was $1.23.he also used a coupon for $0.75 off his purchase.If each notebook had same cost,how much did each notebook cost?
Wednesday, February 4, 2015 at 8:49pm
True or False. If possible kindly explain why so that I can understand it. Thanks much. 1. f(x) = 1^x is not an exponential function. 2. Every exponential function is strictly increasing.
Wednesday, February 4, 2015 at 8:17pm
It says here Write as a single power, then evaluate. Express answers in rational form. ⁴√18× ⁴√9 ÷ ⁴√2 18^(1÷4)× 9^(1÷4) ÷2^(1÷4) My problem here is I couldn't find a way to get all the ...
Wednesday, February 4, 2015 at 8:15pm
7th grade math
The sum of an integer and the next greater integer is at the most 13. Write an inequality to find the lesser integer and solve for the lesser integer. My answer n+n+1 <_ 13 n<_6
Wednesday, February 4, 2015 at 7:39pm
math help!!!!! Thanks
Find the surface area for the given square prism. ----------- l. l 8in. l. l l. l l----------l 10 in. 14 in. A.564 in^2 B.664 in^2 C.1,120in^2 D.1,080 in^2 Can somebody explain how to work this problem out? Because when I try I'm only getting 196, 216 Or 276. Please don...
Wednesday, February 4, 2015 at 7:30pm
Which statement is ALWAYS true? A) The sine of an angle is equal to the sine of the angle's complement. B) The cosine of an angle is equal to the sine of the angle's supplement. C) The sine of an angle is equal to the cosine of the angle's complement. D) The cosine...
Wednesday, February 4, 2015 at 7:00pm
Q. Each fire hose at the La Salle Fire Station is 25 yards long. The station needs enough fire hoses to reach from any hydrant to the farthest house, which could be up to 230 away. What is the minimum number of hoses that the La Salle Fire Station should have? - A. Do I divide...
Wednesday, February 4, 2015 at 6:52pm
Caitlyn bought a helium tank to fill spherical balloons for a party. If the diameter of the filled balloons are 14.4 inches, how much helium would be needed in each balloon?
Wednesday, February 4, 2015 at 6:44pm
Suppose 1% of the population is known to have a medical condition. There is a test for the condition, and 80% of people with the condition test positive for it. Also, 10% of people without the condition test positive for it. Follow these steps to find the probability that a ...
Wednesday, February 4, 2015 at 6:38pm
Q. In a decrement timed drill, at the sound of a fire alarm it took a fire fighter 9.5 seconds to reach the Fire pole, 3.2 seconds to slide down the pole, 13.6 to put on protective gear, 5.7 to climb aboard the truck. How long did it take the fighter to be ready and aboard the...
Wednesday, February 4, 2015 at 6:35pm
Adam used the 3 fractions to make a circle graph and colored each a different color. What fraction of a graph is not colored? Expalain your answer. The fractions are 2/5, 1/6, and 1/3.
Wednesday, February 4, 2015 at 6:29pm
Find the surface area for a square prism. The base is 14 in. The perimeter is 8 in. The height is 10 in. A.564 in^2 B. 664in^2 C. 1,120 in^2 D. 1,080 in^2 I need help figuring it out please. Thank you
Wednesday, February 4, 2015 at 6:21pm
Math - Absolute Value Inequalities
Please help me with the following: Which of the following expressions is equivalent to |x 2| < 3? A. 3 > x 2 < 3 B. 3 < x 2 < 3 C. x 2 < 3 and x 2 < 3 D. x 2 < 3 or x 2 < 3 I ...
Wednesday, February 4, 2015 at 5:47pm
I know its 1 - P(5/128) but I dont think its correct?? I flip a fair coin seven times in a row. What is the probability that I get at most five heads?
Wednesday, February 4, 2015 at 5:40pm
Tickets to a concert cost $12 for kids and $15 for adults. A total of 300 tickets were sold and total receipts were $4140. How many were adult tickets and how many kids?
Wednesday, February 4, 2015 at 4:05pm
write two consecutive perfect square closest to 20. estimate the value of square 20 . square your estimate. use this value to revise your estimate. keep revising your estimating until the square of the estimate is within 1 decimal place of 20. my eng is limited, can anyone ...
Wednesday, February 4, 2015 at 3:47pm
Below are two pairs of points. A line goes through each pair of points. What are the coordinates for the intersection of the two lines? Show your work. Pair 1 (1,1) and (7,7) Pair 2 (0,8) and (8,0)
Wednesday, February 4, 2015 at 2:41pm
math lit, geography, life science,business studies
hey there! what career can do with math lit, geography, life science and business studies?
Wednesday, February 4, 2015 at 1:51pm
***Check Answers Plz*** 1)suppose the total momentum of two masses before a collision is 100 kg m/s.what is the total momentum of the two masses after they collide? a~0 kg m/s b~50 kg m/s c~100 kg m/s****(My answer) d~200 kg m/s 2)What is the momentum of a 20.0 kg scooter ...
Wednesday, February 4, 2015 at 1:27pm
mr. goggins planted 10 rows of beans, 10 rows of squash, 10 rows of tomatoes, and 10 rows of cucumbers in his garden. he put 22 plants in each row. draw an area model, label each part, and then write an expression that represents the total number of plants in the garden.
Wednesday, February 4, 2015 at 12:49pm
Which of the following homogeneous systems have a nontrivial solution? 5x+ y + 5z =0 −2x + 2y− 4z = 0 4x− 3y + 6z = 0 can someone please explain how you know
Wednesday, February 4, 2015 at 11:55am
A solid cone of height 12cm and radius 9 cm is recast into a solid sphere. Calculate the surface area of the sphere. cone V= 1/3 pi r^2 h sphere V= 4/3 pi r^3 area of sphere = 4r^2 how to find sphere of radius?
Wednesday, February 4, 2015 at 2:16am
I have a bag that contains 10 red marbles, 9 green marbles, and 6 blue marbles. I reach into it and take one marble at random. Keeping that marble, I reach into the bag again and take a second marble at random. a. What is the probability that the first marble is green and the...
Wednesday, February 4, 2015 at 1:47am
Suppose you are exchanging currency in the London airport. The currency exchange service there only makes transactions in which one of the two currencies is British pounds, but you want to exchange dollars for Euros. Thus you first need to exchange dollars for British pounds...
Tuesday, February 3, 2015 at 11:13pm
Ed, bob, and sue want to share 24 crackers. They each get 8. Bo comes along and they want to share with him too. Now they each get 6. A. what is the ratio of people? I think 3:4 B. What is the ratio of crackers? I think 8:6 or 4:3simplified. C. Explain how these two ratios are...
Tuesday, February 3, 2015 at 11:06pm
Draw a velocity vector to represent the following (1cm represents 10km/h): a) a girl running around a circular track travelling at 15km/h heading due east. In the solutions, it shows it heading south, why is that?
Tuesday, February 3, 2015 at 10:59pm
Lucy has 40 bean plants,32 tomato plants,and16 peppers plants.She wants to put the plants in rows with only one type of plant in each row.All rows will have the same number of plants.How many plants can Lucyput in each row
Tuesday, February 3, 2015 at 10:55pm
Mary saved $44. On Thursday, she spent $7 of her savings. what ratio represents the portion of her total savings that she still has? I know she has $37 left but I don't understand what ratio it would be.
Tuesday, February 3, 2015 at 10:46pm
Math - Operations with Algebraic Vectors
If a = 3i + 2j and b=-2i+j calculate |a+b| a and b are vectors and i and j have the arrow pointy thing above it instead of the dots. The correct answer is square root 11. So, what I did was substitute a + b with the equations: =(3i+2j-k)+(-2i+j) =i+3j-k Now I'm stuck and ...
Tuesday, February 3, 2015 at 10:41pm
Math: Intro to Vectors
Left side = right side check type of question. x - (x + y)/2 = (x - y)/2 What I did was times the x in the left side by 2. I got: =(2x-x+y)/2 which equals =(x+y)/2 But the left side is (x-y)/2. What am I doing wrong?
Tuesday, February 3, 2015 at 9:05pm
Math( PLease help Ms. Sue)
Use the figure shown to complete each of the following questions. 1. ∠QTR and ______ are complementary. ∠QTS ∠RTS ∠PTN ∠QT 2. ∠QTN and _____ are supplementary. ∠QTS ∠QTP ∠RTS ∠PTR 3. If ∠PTQ measures 29°, ...
Tuesday, February 3, 2015 at 8:11pm
Identify the solid formed by the given net. The middle and a triangle on each edge of the middle triangle. A. Triangular prism B. Triangular pyramid C. Cone D. Triangle Is the answer B? Thank you
Tuesday, February 3, 2015 at 8:03pm
When Juan divides each of five consecutive integers by his age , the sum of five remainders he gets is 32 . When Nikita ,several years older , divides each of a different set of five consecutive integers by her age , the sum of the five remainders she gets is also 32 . What is...
Tuesday, February 3, 2015 at 7:56pm
Name the solid according to its description: The figure has two bases that are parallel congruent circle. A. Cylinder B. Rectangular prism C. Sphere D. Cone Is the answer A? Thank you
Tuesday, February 3, 2015 at 7:55pm