All Questions ⁺⁰237680 Questions

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436

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Math help

John has n pencils. Michael has four times as many pencil as John. Lasha has five times as many pencils as Michael. How many pencils do they have altogether?

ElectricPavlov ●

Guest Jul 24, 2021

Jul 23, 2021

0

449

2

Polynomials

For what value of k is the remainder 0 when the function g(x)=-3xk^3+kx-2 is divided by (x-2)?

Guest Jul 23, 2021

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408

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+68

Help please

brinlin Jul 23, 2021

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479

1

+68

Help please

brinlin Jul 23, 2021

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424

1

Quadratic

The quadratic x^2 + bx + 16 = 0 has a double root. Find all possible values of b.

ElectricPavlov ●

Guest Jul 23, 2021

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432

1

help algebra

Given that x satisfies x^2 - 5x + 1 = 0, find the value of x^4 + 1/x^4.

Guest Jul 23, 2021

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479

2

need help

If we write sqrt(2) + sqrt(3) + 1/(2*sqrt(2) + 3*sqrt(3)) in the form (a*sqrt(2) + b*sqrt(3))/c such that a, b, and c are positive integers and c is as small as possible, then what is a + b + c?

Guest Jul 23, 2021

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446

1

help thanks

The base of a solid is the region between the parabolas x=y^2 and 2y^2 = 3-x . Find the volume of the solid if the cross-sections perpendicular to the -axis are equilateral triangles.

Guest Jul 23, 2021

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405

1

help with quadratic

The equation y = -16t^2 + 28t + 180 describes the height (in feet) of a ball tossed up in the air at 28 feet per second from a height of 180 feet from the ground. In how many seconds will the ball hit the ground?

Guest Jul 23, 2021

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319

0

Quadratic

The quadratic x^2 + 3/2*x - 1 has the following unexpected property: the roots, which are 1/2 and -2, are one less than the final two coefficients. Now find a quadratic with leading term x^2 such that the final two coefficients are both read more ..

Guest Jul 23, 2021

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405

1

Number Theory

Let n be a positive integer. If a = 414n + 12 , what is the remainder when a is divided by 9?

Guest Jul 23, 2021

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480

1

Sequence

The sequence 54675, 18225, 6075, 2025, 675, ... is made by repeatedly dividing by 3. How many integers are in this sequence?

Guest Jul 23, 2021

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431

1

Angles

What is the measure (in degrees) of the smallest interior angle of a triangle in which the exterior angle measures have the ratio $4:5:8?$

Guest Jul 23, 2021

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433

1

Analytic geometry

In terms of pi, what is the area of the circle defined by the equation 2x^2+2y^2+10x-6y-48=0

Guest Jul 23, 2021

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403

1

Algebra

The parabolas defined by the equations y = -x^2 - x + 1 and y = x^2 - 3x - 3 intersect at points (a,b) and (c,d), where c >= a. What is c - a? Express your answer as a common fraction.

Guest Jul 23, 2021

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418

2

help pls

Positive real numbers x, y satisfy the equations x^2 + y^2 = 1 and x^4 + y^4 = 17/19. Find xy.

Guest Jul 23, 2021

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425

1

help plz

If a + b = 7 and a^3 + b^3 = 44, what is the value of the sum 1/a + 1/b? Express your answer as a common fraction.

Guest Jul 23, 2021

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361

1

Answer question please

A stick has a length of $5$ units. The stick is then broken at two points, chosen at random. What is the probability that all three resulting pieces are shorter than $2$ units?

(All other answers to this question were wrong) read more ..

Guest Jul 23, 2021

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520

1

Suppose we have a bag with $10$ slips of paper in it. Eight slips have a $3$ on them and the other two have a $9$ on them.

Suppose we have a bag with $10$ slips of paper in it. Eight slips have a $3$ on them and the other two have a $9$ on them.

What is the expected value of the number shown if we add one additional $9$ to the bag?

(All other read more ..

Guest Jul 23, 2021

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436

1

Precalc

In triangle LMN, we have angle M = 90, MN = 2, and LM = sqrt(19). What is sin L?

Guest Jul 23, 2021

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430

1

Algebra

Completely simplify and rationalize the denominator: $$\frac{\sqrt{160}}{\sqrt{252}}\times\frac{\sqrt{245}}{\sqrt{180}}$$

Guest Jul 23, 2021

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467

2

Rational Word Problem

Karen and Benjamin are ecologists studying forest regeneration. Working together, they can count the seedlings on a research site in 2h. It takes Karen 8h to count on her own. How long would it take Benjamin to count the seedlings on his own? Give the answer read more ..

Guest Jul 23, 2021

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418

1

Polynomials

Let f(x) = x^3 + 3x ^2 + 4x - 7 and g(x) = 7x^4 + 5x^3 +x^2 - 7. What is the coefficient of x^3 in the sum f(x) + g(x)?

Guest Jul 23, 2021

0

394

1

Coordinates

The equation (x - 7)^2 + (y + 13)^2 = 12^2 represents a circle. What is its radius?

MathProblemSolver101 ●

Guest Jul 23, 2021

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491

1

Please help!!!

Two consecutive integers are represented by x and x+2. The sum of the reciprocals of the integers is 29/420. Show your work and algebraically determine the two integers.

ElectricPavlov ●

Guest Jul 23, 2021

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