All Questions ⁺⁰237687 Questions

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374

1

Inverse Functions

If h(y) = (1 + y)/(2 - 2y), then what is the value of $h^{-1}(5)$? Express your answer in simplest form.

Guest Jan 5, 2022

0

398

1

Coordinates

A line through the points (2, -9) and (j, 17) is parallel to the line 2x + 8y = 21. What is the value of j?

Guest Jan 5, 2022

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394

1

Algebra

a,b, and c are constants such that the quadratic ax^2 + bx + c can be expressed in the form 2(x - 5)^2 - 8. When the quadratic 3ax^2 + 3bx + 3c (for the same values of a, b, and c) is expressed in the form n(x - h)^2 + k, what is h?

Guest Jan 5, 2022

0

367

2

System

If x, y, w, z are real numbers satisfying

w+x+y = -2
w+x+z = 4 read more ..

Guest Jan 5, 2022

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389

1

Math problem

If a and b are positive integers for which ab-6a+5b=15, what is the minimal possible value of |a-b|?

Guest Jan 5, 2022

Jan 4, 2022

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278

1

help plz

When we expand (2x+7/2)^6 what is the coeeficent of the term x^4?

Guest Jan 4, 2022

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346

1

Counting

How many different three-digit odd numbers can be formed using the digits 3, 4, 5 and 6 if digits can be repeated?

Guest Jan 4, 2022

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412

2

Parabola

Find the equation whose graph is a parabola with vertex (2,4), vertical axis of symmetry, and contains the point (1,17). Express your answer in the form "ax^2+bx+c".

Guest Jan 4, 2022

0

269

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Polynomials

Let p(x) = x^2 , q(x) = 2x^3 + x^2 + 1, and r(x) = 7x^4 − 5x^3 + 6x − 2. Find p(q(x)) + r(x).

Guest Jan 4, 2022

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303

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Geometry

The altitudes in an acute triangle have lengths $2,$ $5,$ and $h^2.$ Find all possible values of $h^2$.

Guest Jan 4, 2022

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428

1

Algebra

The height (in meters) of a shot cannonball follows a trajectory given by$h(t) = -4.9t^2 + 14t - 0.4 at time (in seconds). As an improper fraction, for how long is the cannonball above a height of 8.7 meters?

Guest Jan 4, 2022

+8

446

1

+364

counting question

For how many three-element sets (order doesn't matter) of positive integers {a,b,c} is it true that a*b*c=2310? (The positive integers a, b, and c are distinct.)

XxmathguyxX Jan 4, 2022

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419

1

Counting

Suppose that I have 6 different books, 2 of which are math books. In how many ways can I stack my 6 books on a shelf if I do not want the math books to be at the ends?

Guest Jan 4, 2022

0

255

0

Inverse Functions

The inverse of function f(x) = (2x - 1)/(x - 8) is written in the form of $f^{-1}(x) = (ax + b)/(c + d)$, where a, b, c, and d are all real numbers. Find a/c.

Guest Jan 4, 2022

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387

2

What is the value of x if 7-9x=11

What is the value of x if 7-9x=11

Guest Jan 4, 2022

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426

2

Multiplication

Tim's garden is divided into 3 sections.
There are three times as many pepper plants as cucumber plants.
There are twice as many tomato plants as pepper plants.
If there are 8 cucumber plants, how many tomato plants are there? read more ..

Guest Jan 4, 2022

0

417

1

Counting problem

An ordinary 6-sided die has a number on each face from 1 to 6 (each number appears on one face). How many ways can I paint two faces of a die blue, so that the product of the numbers on the painted faces isn't equal to 4?

Guest Jan 4, 2022

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418

2

Math

Paul and Eric collected 270 phone cards altogether, Paul collected 4 times as many phone cards as Eric. How many phone cards must Paul give Eric so that they would have an equal number of phone cards?

Guest Jan 4, 2022

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401

1

Math problem

Let a, b, and c be integers that satisfy 2a+3b=52, 3b+c=41, and bc=70. Find a+b+ c.

Guest Jan 4, 2022

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354

2

geometry

An equilateral triangle shares a common side with a square as shown. What is the number of degrees in angle CDB?

read more ..

Guest Jan 4, 2022

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292

0

Function

A real-valued function f defined for nonzero real numbers satisties f(1/x)+1/x*f(-x) = 2. What is the value of f(2)?

Guest Jan 4, 2022

0

317

1

quadratic

If we express 3x^2-8x-2 in the form a(x-h)^2+k , then what is a+h+k?

Guest Jan 4, 2022

0

262

0

Algebra

Let a and b real numbers such that x^4+2x^3-4x^2+ax+b = (Q(x))^2 for some polynomial Q(x). What is the value of a + b?

Guest Jan 4, 2022

0

377

1

Percent

The population of Smallville increased by 20% from 2000 to 2005, and it increased by 30% from 2005 to 2010. By what percent did the population of Smallville increase from 2000 to 2010?

Guest Jan 4, 2022

0

340

1

Trapezoid

What is the number of square centimeters in the area of this trapezoid?

Guest Jan 4, 2022

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