2,489 Answered Questions for the topic mathematics

Supremum and infimum

X1 = { x | x = 0 or x = (1/n) ; n € N(N - set of natural numbers)Find the supremum and infimum(if they exists ) of set X1

Need help solving "Xa*9.6%+(1-Xa)*7.8%=8.88%"

"Xa*9.6%+(1-Xa)*7.8%=8.88%"i need the answer for finance, i'm having trouble get the answer

Marbles probability question

6 marbles, 3 of which is defective.Upon inspection on defective marble, 80% chance to successfully confirm indeed defective.However, inspection made on good marble has a 5% chance of wrongly... more

Find the change in annual cost when Q is increased from 356 to 357, and compare this with the instantaneous rate of change when Q = 356.

The annual inventory cost C for a manufacturer is given below, where Q is the order size when the inventory is replenished. Find the change in annual cost when Q is increased from 356 to 357, and... more


Suppose you bet $1 on red at the roulette wheel. There are 18 red numbers and 20 nonred numbers (including the green 0 and 00). You win $1 if a red number comes up, and you lose $1 if any other... more

Find the average rate of change of the function over the given interval.

f(t) = 4t2 − 5,      [3, 3.1]Compare this average rate of change with the instantaneous rates of change at the endpoints of the interval.left endpoint:right endpoint:

Find k such that the line is tangent to the graph of the function.

Function: f(x)= kx Line: y=4x+4

find the missing number to complete the porportion

4 apartments on 1 floor=_______ Apartments on 5 floors

What is 8+8/8*8-8

How much time has a team spent on points

A team had finished 115points of work in 9sprints (one sprint is 2weeks) in 9sprints they avg out to 422.66 hrshow much time is spent on each point?confused on this so far I did the... more

A town has a population of 7000 and grows at 4% every year. What will be the population after 13 years, to the nearest whole number?

Exponential Functions - BasicFeb 20, 5:25:04 PMi really neeeeeeeeeeeeeeeeeeeed hellllllllllllllllllllllllllllllp and it's due tmrw so pleaseeeeeeee

How am I to find the slope, y-intercept and GRAPH it? PLEASE ANSWER SOON!!! 😬 😬 😬 😬

My teacher showed us that:if x=1 and y=-1, 0, 1-1-0-11-2 2 My result was undefined.My question is how are both sides equal? Let's say that x=4 will Y= -4, 0, 4? I don't know how to graph or solve... more

Determinant of a matrix

A=(aij)n*n is square matrix of order n. Given that det(A)= infinity , what is the value of det(bA) , b is a constant

Write the polynomial in descending powers of the variable with no missing powers. 6y+4y^4

Write the polynomial in descending powers of the variable with no missing powers. 6y+4y^4 Thankyou so much, very confused on how to not leave out missing powers.

The rectangle has width of 7x^9 feet and length 9x^6 feet. Find it’s area as an expression of x.

Been stuck on this problem for awhile, please help! Thankyou.

Find an equation of a line that is tangent to the graph of f and parallel to the given line.

function: f(x)=x3 Line: 12x - y + 1 = 0y (smaller y-intercept)=y (larger y-intercept) = I got -16 and 16, which was marked wrong. Please help. Thanks!

Four less than the product of 6 and a number equals 8

Four less than the product of 6 and a number equals 8

Write the following comparison as a ratio reduced to lowest term: 126 minutes to 4 hours

it needs to be in fraction form

Find the side of the triangle

The perimeter of an equilateral triangle is 1111 inches more than the perimeter of a​ square, and the side of the triangle is 66 inches longer than the side of the square. Find the side of the... more
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