All Questions +0 238211 Questions

Let $z$ be a nonreal complex number such that $|z| = 1.$ Find the real part of $\frac{1}{1 - z}.$

Guest Nov 27, 2020

799

Intermediate Algebra Basic Complex Question

hectictar ●●●

Guest Nov 27, 2020

629

binomials

Thea has a key on her calculator marked blue star. If an integer is displayed, pressing the blue star key chops off the first digit and moves it to the end. For example, if 6138 is on the screen, then pressing the blue star key changes read more ..

Guest Nov 27, 2020

620

Thea has a key on her calculator marked blue star

Pat has two sheets of large, square stamps. One sheet consists of 9 stamps arranged in a 3-by-3 square. (That's 3 stamps by 3 stamps, not 3 inches by 3 inches.) The other sheet consists of 100 stamps arranged in a 10-by-10 square. The stamps on each read more ..

Guest Nov 27, 2020

731

Pat has two sheets of large, square stamps

Trapezoid ABCD has parallel bases AB and CD. Let AD=5 and BC=7, and let P be a point on side CD such that CP/PD=7/{5}.$ Let X,Y be the feet of the altitudes from P to AD, BC respectively. Show that PX=PY. read more ..

Guest Nov 27, 2020

1054

Has been posted already, but no answer! PLEASE HELP!!!

Given that f(3) = 5 and f(3x) = f(x) + 3 for all x, find f^{-1}(11).

Guest Nov 27, 2020

580

function

Let f(x) = 3x^2-3 and g(f(x)) = x^2 + x +1. Find the sum of all possible values of g(25).

Guest Nov 27, 2020

1087

+367

What is the sum of all the odd integers between 500 and 700?

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imdumb Nov 27, 2020

681

g(25)

The red parabola shown is the graph of the equation . Find .

Each tick mark on the graph is one unit.

Guest Nov 27, 2020

782

+179

A red parabola

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TheGreatestOofman Nov 27, 2020

871

A 30-60-90 triangle

A 30-60-90 triangle is drawn on the exterior of an equilateral triangle so the hypotenuse of the right triangle is one side of the equilateral triangle. If the shorter leg of the right triangle is 6 units, what is the area of the equilateral triangle? read more ..

I am trying to answer the following question:

"What is the probability that you guess (at random, in correct order) the 1st, 2nd and 3rd place winners before a race with 10 contestants?"
read more ..

Guest Nov 27, 2020

807

+34

Places on a Podium Probaility

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WillyGolden Nov 27, 2020

521

A steel sphere with a 3-inch radius

A steel sphere with a 3-inch radius is made by removing metal from the corners of a cube that has the shortest possible side lengths. How many cubic inches are in the volume of the steel that is removed?

Suppose that there is only one value of for which the distance from to is . If a what is ?

Guest Nov 27, 2020

653

help on algebra

If the diameter of a right cylindrical can with circular bases is increased by 25%, by what percent should the height be decreased in order to preserve the volume of the original can?

Guest Nov 27, 2020

670

diameter of a right cylindrical

Hi! I am trying to figure out why the answer to the following question is 1/900,000:

"What is the probability of guessing my seven-digit number in ten attempts (assume a positive number that's regenerated after each guess, and no read more ..

Guest Nov 27, 2020

1626

+34

Probability of guessing 7 digit number in 10 tries

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WillyGolden Nov 27, 2020

726

A group of nine people is be split into three teams

A group of nine people is be split into three teams, so that one team has four people, another team has four people, and the final team has one person. How many ways can this be done?

A child throw a ball vertically upward from
the roof of a tall building at t=0.0 s with a velocity 25 m/s. The ball is the freely moves in the
air without friction. (a) Write down equations for the position y(t), instantenous velocity v(t)
&read more ..

Guest Nov 27, 2020

621

phys

The medians AD, BE, and CF of triangle ABC intersect at the centroid G. The line through G that is parallel to BC intersects AB and AC at M and N , respectively. If the area of triangle AGM is 144, then find the area of triangle AGN.

Guest Nov 27, 2020

891

The medians AD, BE, and CF of triangle ABC intersect at the centroid G

The complete graph of y = f(x) , which consists of five line segments, is shown in red below. (On this graph, the distance between grid lines is 1 .)

What is the sum of the x-coordinates of all points where f(x) = 1.8?
read more ..

Guest Nov 27, 2020

709

The complete graph of y = f(x)

The Coupland family has seven children and four adults. They want to get some corn dogs, but their van can only hold four children and two adults. How many ways can the people in the van be chosen?

Guest Nov 27, 2020

519

The Coupland family

What is the sum of the positive integers that are solutions of -3n + 3 > -100?

Guest Nov 27, 2020

Nov 26, 2020

569

inequality question

I have the following question:

Let $a,$ $b,$ and $c$ be nonnegative real numbers, and let $A=(0,0),$ $B=(a,b),$ and $C=(c,0)$ be points in the coordinate plane, such that $AB=AC.$ Let $D$ be the midpoint of $\overline{BC},$ let $E$ read more ..

Guest Nov 26, 2020

787

+421

How do I prove this?

Marina solved the quadratic equation 9x^2 - 36x - 720 = 0 by completing the square. In the process, she came up with the equivalent equation
(x + r)^2 = s
where r and s are constants. What is s?

Pangolin14 Nov 26, 2020

637

quadratic

Round trip fare to Ireland is $864. If kids can fly for ⅔ fare, determine the total fare for a family of 2 adults and 4 kids.

Guest Nov 26, 2020

481

Fraction/Decimals