maths

This page lists questions and answers that were posted by visitors named maths.

Questions

The following questions were asked by visitors named maths.

(a) Find the indeﬁnite integrals of the following functions. (i) f (t) = 6 cos(3t) + 5e^−10t (ii) g(x) = 21-12x^3/ x (x > 0) (iii) h(u) = cos^2( 1/8 u) (b) Evaluate: (this big F sign at the start, 5 at the top and 1 at the bottom) 5 1/4x (7 + 6x^2) dx F 1...

are all regular hexagons similar? how can i explain?

given that a/b=c/d, decide whether it is true or not that a/c=b/d. and how can i explain my reasoning?

a) find the equation of AB, the perpindicular bisector of the line joining the points P(-3,1) and Q(1,9) (line AB intersects the point at midway of PQ) b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis, determi...

There are N ordered integer quadruples (a,b,c,d) subject to 0≤a,b,c,d≤99990 such that ad−bc≡1(mod99991). What are the last three digits of N?

f(x)=x ^2 +bx+c , b and c real .Find the minimum of (max|f(x)|)for x∈[−10,10]?

Find the smallest n such that for any prime p, at least 20 numbers 1,2, ..., n are quadratic residues not modulo p. k is quadratic residue modulo p if there exists an integer j such that j^2 ≡ k (mod p).

Suppose p(x)=ax^2+bx+c is a quadratic polynomial with real coefficients and |p(x)|≤1 for 0≤x≤1. Find the largest possible value of |a|+|b|+|c|.

The efficiency of a machine is in general defined as the ratio between useful (released) energy and the input energy. Therefore, the exact formulas for efficiency depend on the purpose of the machine. What's the difference in the maximal efficiency of a h...

A subset S of {1,2,…,n} is said to be packed if whenever i,j∈S the number ⌊(i+j)/2⌋ is also in S. Determine how many subsets of {1,2,…,25} are packed. Details and assumptions i and j need not be distinct. If i=j is in the set, then clearly so is ⌊(i+j)2⌋

A factory produces two products A and B using raw materials p and q. It uses 3 units of p and 1 unit of q to produce one unit of A. It uses 1 unit of p and 2 units of q to produce one unit of B. The maximum daily supplies are 330 units of p and 220 units...

Alice has 4 times as much money as Benny. If Benny has $36 less than Alice, how much money do they have altogether? A $45 B $48 C $60 D $180

i am a two digit number above 50. the sum of my digits is 12. and the difference of my digits is 4. who am i?

prove that the value of cosx + secx can never be 3/2.

a train running at the speed of 180 km hr crosses a 365 meter long platform in 21sec. what is the length of the train

. 30 girls and boys have planned for a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?

if A and B are in ratio 3:4 and B and C in 12:13,then A and C will be

an urn contains 2 white and 2 black balls. a ball is taken at random. if the ball is white then it is not replaced otherwise it is replaced along with another ball of the same colour. find the probability that the third ball drawn is black.

in a class 7 2 fifthy were girls ,27were boys ,how many girls were there

cosx+cosy=a and sinx+siny=b show that sin2x+sin2y=2ab(1-(2/(a^2+b^2)) plz plz show step

An ac source of 50v,100÷πHz is connected in series with an inductor of inductance L ad a resistor of resistance R.the current in the circuit is 2A ad p.d. across L and R are 30v ad 40v respectively 1) calc d average power dissipated 2) calc d power factor...

1^2014 + 2^2014 + 3^2014 + 4^2014 + 5^2014 divided by 5, remains ______

Two no which have same digit their sum is 9and difference is 27what will be the nos

1/2,3/2 and 6/2 find the value

Molly's dad is 22 years older than Molly. Twice her dad's age minus three times molly's age is equal to 31. What is the age molly and her dad?

A gas station is 12 Kilometers away. How far is that in miles? Assume 1 mile is 1.6 kilometers.

1) Anne saw an elephant at the zoo. The elephants mass was about 5,000 [grams or kilograms] ? - i think kilograms 2) In his shower, Jim used about 110 [liters or mililiters] of water.- i think liters 3) The opening of the drinking straw was about 7 [milim...

A chicken soup recipe calls for 11 cups of chicken stock. How much is this in quarts? Write your answer as a whole number or a mixed number in simplest form. Include the correct unit in your answer.

A parachutist's rate during a free fall reaches 225 kilometers per hour. What is this rate in meters per second? At this rate, how many meters will the parachutist fall during 5 seconds of free fall? Do not round your answers.

(a) An angle measures 25 degrees. What is the measure of its complement? (b) An angle measures 136 degrees. What is the measure of its supplement?

how do you find the perimeter?

square root of 33

how to find area of a rectangle

A cable is 8.9m long. How long is the cable in decimeters? Be sure to include the correct unit in your answer.

solve for x 15 over 7 = -3x

write 2xsquared to the 3rd power without exponents

write 3 and 1 over 8% as a decimal, not a percent

Solve the following proportion for y . Round your answer to the nearest tenth. 13 over 17 = 9 over y

write all the factors of 16

solve for x 15 over x+1 = 12 over x

There is a triangle. The angles are (4x+14), (5x+4) and (6x-3). Find the measure of the angles for the triangle.

There is a triangle with the measures (5x-1), (8x+5) and (4x+6). Find the measures for each angle.

Apply the Triangle Inequality Theorem and determine which group of side measures will form a triangle. A) 12, 10, 22 B) 8, 1, 7 C) 9, 4, 3 D) 2, 7, 6

Find the complement of the set given that U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}. (Use the roster method to write the set. Enter EMPTY or ∅ for the empty set.) {composite numbers}

Find the number of subsets of the given set. A truck company makes a pickup truck with 13 upgrade options. How many different versions of this truck can the company produce?

Let U = {1, 2, 3, 4, 5, 6, 7, 8}, A = {2, 6, 7}, B = {3, 4, 6, 8}, and C = {1, 5, 8}. Consider the following. A ∪ B' What does A ∪ B' mean? 1) the union of sets A and B 2) the complement of the union of sets A and B 3) the intersection of sets A and B 4)...

Let U = {1, 2, 3, 4, 5, 6, 7, 8}, A = {2, 4, 5}, B = {2, 3, 6, 8}, and C = {1, 3, 7}. Find the following. (Use the roster method to write the set. Enter EMPTY or ∅ for the empty set.) A ∪ (B ∪ C)

A survey of 1,700 commuters in New York City showed that 1,130 take the subway, 620 take the bus, and 110 do not take either the bus or the subway. (a) How many commuters take both the bus and the subway?

A survey of 1,700 commuters in New York City showed that 1,130 take the subway, 620 take the bus, and 110 do not take either the bus or the subway. (a) How many commuters take both the bus and the subway? (b) How many commuters take only the subway?

Write the ratio in simplest form using a fraction. A house with an original value of $270,000 increased in value to $330,000 in 5 years. What is the ratio of the increase in value to the original value of the house?

During filming, an IMAX camera uses 65-mm film at a rate of 5.6 ft/s. (a) At what rate (in ft/min) does the camera go through film?

According to the Bureau of Labor Statistics, in a recent year, there were 16,347,000 women aged 25 to 34 who were employed and 5,206,000 who were unemployed but looking for work. What is the rate per 1,000 women aged 25 to 34 who were employed? Round to t...

Identify the quadrilaterals that can be constructed with congruent diagonals that bisect each other.

E to F is 6 cm. Courtney is constructing quadrilateral EFGH, where EF = 6cm, FG= 2cm, EH=5cm, <HEF = 60 degrees and <EFG = 140 degrees. Courtney starts by drawing line segment EF = 6m. If she wants to locate point H next, what should Courtney do? A) Start...

what is 2 times 100 percent?

what does 2 multiplied by 100 percent equal?

what is the probability that a quarter lands on heads 4 times in a row?

what is 1 times 100%

4. If three coins are flipped simultaneously, what is the probability that all three will be heads?

A penny tossed 120 times results in 62 heads and 58 tails. a. Calculate the expected number of heads and tails and determine the percent deviation.

If man and a woman have five children (all girls), is it correct to assume that probability would favor their next child being a boy? Explain.

flip a quarter 50 times. how many times does it come up heads? how many tails?

A rectangle mural has a shorter side of 5 yards. The longer side measures 3 yards longer. How many square yards in the mural's area?

Triangle height of 6 inches and base of 7 inches. What is the area in square inches

There is a 1 over 25 scale drawing of a triangular sail. The triangle in the drawing is 2 feet high with a base of 1 foot. What is the area of the sail

Tom prints a photo of a penguin. The print measures 6 cm by 4 cm. He wants to reize the photo into the size of a postcard with a length of 15 cm. What will the area be

I draw 2 similar right triangles. The longest side of the larger triangle measures 21 cm and the shortest side of that one is 14cm. The longest side of the smaller triangle is 15 cm. What is the length of the shorter side of the smaller triangle?

The population density of a certain city is approximately 10,000 people per square mile. If the area of the city is 67.4 square miles, approximately how many people live in the city?

A certain cell in the human body is approximately 0.000000057 meter wide. Write the width (in m) of the cell in scientific notation.

Find the complement of the set given that U = {2, 3, 4, 5, 6, 7, 8, 9, 10}. (Use the roster method to write the set. Enter EMPTY or ∅ for the empty set.) {4, 6, 8, 9}

Find the width, in inches, of 65 mm film.

Three people pool their money to buy lottery tickets. The first person put in $20, the second $25, and the third $30. One of their tickets was a winning ticket. If they won $6.3 million, what was the first person's share of the winnings (in dollars)?

what is 22% off of $30

explain to me why 56.25% is 9/16 as a fraction..

18.75% as a fraction

in a recent year, the IRS reported that it had received 137 million tax returns. Of these, 89% were filed electronically. How many of the returns were filed electronically? Round to the nearest million.

If you withdraw part of your money from a certificate of deposit before the date of maturity, you must pay an interest penalty. Suppose you invested $7000 in a one-year certificate of deposit paying 8.6% interest. After 6 months, you decide to withdraw $7...

An accountant purchases a T-bill with a face value of $6,000 for $5,935. If the term of the T-bill is 135 days, what is the annual simple interest rate (in percent) earned by the client? Round to the nearest tenth of a percent. (Use 360 days in 1 year.) S...

The maturity value of a 4-month loan of $5,250 is $5,361.50. What is the annual simple interest rate (in percent) on this loan? (Round your answer to one decimal place.) Show your work

The maturity value of a 4-month loan of $8,250 is $8,363.50. What is the annual simple interest rate (in percent) on this loan? (Round your answer to one decimal place.)

Answers

The following answers were posted by visitors named maths.

a sack contain 10 blue and 6 red crayons another sack contains 9 blue and 12 red crayons two crayons are drown at random without replacement from each sack. what is the probability that all the four crayons are blue? exactly one of the four crayons is red

16x+8x+4x^2-16x+20+10+5x-20therefore 4x^2+8x+5x+10 4x^2+13x+10

how did sin(x+y)=2sinxsiny is it not suppose to be sin(2x)

is musculine or feminine

A rectangular floor is 21 feet long and 9 feet wide. What is the area of the floor in square yards?

A cable is 7.9m long. How long is the cable in decimeters?

A coral reef grows 0.17 every week. How much does it grow in 6 weeks? Write your answer in millimeters.

A container holds 3 gallons of juice. How much is this in pints?

A multivitamin tablet contains 16.5 of calcium. How much calcium does a bottle of 40 tablets contain? Write your answer in grams.

If each tablet contains 16.5 MG grams of calcium, how much does calcium does a bottle of 40 tablets contain? Write answer in grams

The price of an item yesterday was $180. Today, the price rose to $243 . Find the percentage increase.

so 5 minutes and 15 seconds ?

A laptop has a listed price of $571.95 before tax. If the sales tax rate is 7.75%, find the total cost of the laptop with sales tax included. Round your answer to the nearest cent, as necessary.

-24= 6w+3(w+7) solve for w

No. The answers are 70 60 40 or 50

There is only one correct answer

Write the ratio in simplest form using a fraction. A house with an original value of $140,000 increased in value to $220,000 in 5 years. What is the ratio of the increase in value to the original value of the house?

as a percentage

base is 9, height is 7, what is the area

explain it better

explain your math

If you withdraw part of your money from a certificate of deposit before the date of maturity, you must pay an interest penalty. Suppose you invested $9000 in a one-year certificate of deposit paying 8.3% interest. After 6 months, you decide to withdraw $9...

in the last step, why do you multiply by 3?

No, the answer is 21,130.77

how does APY = (1.0025)^12 - 1 APY = 1.03043 - 1

how are you getting that (1.0025)^12 - 1 equals 1.030676? My calculator says its 1.027646341

The answer is 15,757.89. why

STILL NO!! The correct answer is 10,446.15

No, the answer is : 67,227.88 Show your math