All Questions ⁺⁰237719 Questions

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408

1

Coordinates

Find the area of the region satisfying the inequality x^2 + y^2 <= 4x + 6y + 73.

Guest Jul 26, 2021

Jul 25, 2021

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489

3

C&P problem

Two cards are dealt at random from a standard deck of 52 cards. What is the probability that the first card is a $\diamondsuit$ and the second card is an ace?

Guest Jul 25, 2021

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524

1

Coordinates

Find the y-intercept of the graph
x^2 - 10x + y^2 - 10y + 25 = -11 + 2y.

Write your answer as an ordered pair. read more ..

Guest Jul 25, 2021

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489

1

Coordinates

The equation x^2 + 6x + y^2 + 6y = 78 represents a circle. What is its center? Write your answer as an ordered pair.

Guest Jul 25, 2021

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408

1

Help graphing

The graph of y=f(x) is shown below in red. For which x value does f(x)=4?
(Assume grid lines are spaced 1 unit apart)

read more ..

ElectricPavlov ●

Guest Jul 25, 2021

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343

1

help

Let f(x)=|x+1|−|2x−3|+|x+2|.
Find the smallest and largest possible values of f(x).
Solve the equation f(x)=0.
Solve the inequality |f(x)|≤1 read more ..

Guest Jul 25, 2021

0

377

0

+24

help please

hendy Jul 25, 2021

0

461

3

+24

HELP PLS

The question is attached to the image.

hendy Jul 25, 2021

0

593

1

+41

HELP!!!!

The values of a function $f(x)$ are given below: \begin{tabular}{|c||c|c|c|c|c|} \hline $x$ & 3 & 4 & 5 & 6 & 7 \\ \hline $f(x)$ & 10 & 17 & 26 & 37 & 50 \\ \hline \end{tabular}Evaluate $f^{-1}\left(f^{-1}(50)\times read more ..

CENTTRAL Jul 25, 2021

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498

3

reposting because the other answer was incorrect

While staying in a 15-story hotel, Polya plays the following game. She enters an elevator on the $6th$ floor. She flips a fair coin five times to determine her next five stops. Each time she flips heads, she goes up one floor. Each time she flips tails, read more ..

Guest Jul 25, 2021

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436

1

help plz

Expand the product (x - 2)^2 (x + 2)^3. What is the product of the nonzero coefficients of the resulting expression, including the constant term?

Guest Jul 25, 2021

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617

3

plz help!!!

What is the remainder when the sum $1 + 7 + 13 + 19 + \cdots + 253 + 259$ is divided by $6$?

Guest Jul 25, 2021

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485

2

geometry

Point Y lies on line segment XZ such that XY = 2 and YZ = 8. Semicircles are constructed with diameters XY, XZ, and YZ. Find the area of the blue region.

read more ..

Guest Jul 25, 2021

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413

1

help plz

What is the sum of all possible values of x such that 2x(x - 10) - x(x - 5) = -50?

Guest Jul 25, 2021

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397

1

quadratic

The equation x^2 + ax = -14 - 6 - 8x has only integer solutions for x. If a is a positive integer, what is the greatest possible value of a?

Guest Jul 25, 2021

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423

1

Precalc

In ABC , cos B = 3/25 and angle A is 90 degrees. What is cos C?

Guest Jul 25, 2021

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342

1

I’ve been stuck for a long time

Evaluate \[\sum_{n = 0}^\infty \frac{\cos n \theta}{2^n},\]where $\cos \theta = \frac{1}{5}.$

Guest Jul 25, 2021

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319

1

Number Theory

If x and y are positive integers for which 3x + y + xy = 115, then what is x + y?

Guest Jul 25, 2021

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475

1

Parabola

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

Guest Jul 25, 2021

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345

1

Probability

While staying in a 15-story hotel, Polya plays the following game. She enters an elevator on 6th the floor. She flips a fair coin five times to determine her next five stops. Each time she flips heads, she goes up one floor. Each time she flips tails, she read more ..

Guest Jul 25, 2021

0

322

1

Coordinates

The area of equilateral triangle inscribed in the circle x^2 + y^2 - 4x + 12y + 1 = 0 is of the form a*sqrt(b)/c.
Find a + b + c.

Guest Jul 25, 2021

0

426

1

help counting

How many of the natural numbers from 1 to 800 inclusive, contain the digit 6 at least once?

Guest Jul 25, 2021

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