All Questions ⁺⁰237671 Questions

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391

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help please if not that is okay you dont have to

Angela wants to know how many families in her neighborhood plan to attend the parade. She puts all 120 of the neighborhood addresses in a hat and draws a random sample of 30 addresses. She then asks those families if they plan to attend the parade. She read more ..

Guest Aug 16, 2021

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351

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Number Theory

Determine the largest possible integer n such that 942! is divisible by 80^n.

Guest Aug 16, 2021

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322

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Coordinates

Find the shortest distance from the line 3x + 4y = 25 to the circle x^2 + y^2 = 6x - 8y.

Guest Aug 16, 2021

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411

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Function

What is the sum of all values of y for which the expression (y + 1)/(y^2 - 5y + 4 + y^2 - 6y) is undefined?

Guest Aug 16, 2021

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427

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Parabola

The graph of y = f(x) is a parabola whose vertex is at (1, -2). The graph of y = f(x +8) is also a parabola. Where is the vertex of the graph of y = f(x + 8)? Write your answer as an ordered pair.

Guest Aug 16, 2021

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420

2

help algebra

A party rental company has chairs and tables for rent. The total cost to rent 6 chairs and 2 tables is 24 dollars. The total cost to rent 3 chairs and 5 tables is 45 dollars. What is the cost to rent each chair and each table?

Guest Aug 16, 2021

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424

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help plz

I decide to hold a little bake sale one weekend where I will be selling jumbo cupcakes at 3.50 each and cookies at 1.25 each. I have a total of 250 in both cupcakes and cookies. At the end of my bake sale I have sold all the cupcakes and cookies I baked read more ..

Guest Aug 16, 2021

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424

1

Number Theory

In the equation 1/j + 1/k = 2/3, both j and k are positive integers. What is the sum of all possible values for k?

Guest Aug 16, 2021

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302

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help coordinates

Determine the number of lattice points enclosed by the graphs of |2x| = 9 and |3y| = 28.

Guest Aug 16, 2021

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446

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Algebra

The polynomial equation x^3 + bx + c = 0 where b and c are rational numbers, has 1 + sqrt(2) as a root. It also has an integer root. What is it?

Guest Aug 16, 2021

+2

542

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+68

I know this is kind of easy but I'm stuck

Find the ratio $\dfrac{a}{b}$ if $\dfrac{a+b}{a-3b}=5$.

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Bulbous Aug 16, 2021

Aug 15, 2021

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442

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i got 4/25 but it was wrong

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?

Guest Aug 15, 2021

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554

2

a little help pls

Let $a$, $b$, and $c$, be nonzero real numbers such that $a+b+c=0$. Compute the value of\[a\left(\frac 1b + \frac1c\right) + b\left(\frac1a + \frac1c\right) + c\left(\frac1a+\frac1b\right).\]

Guest Aug 15, 2021

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299

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Algebra

For what real values of a is x^2 + ax + 125 the square of a binomial? If you find more than one, then list the values separated by commas.

Guest Aug 15, 2021

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381

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Functions

Suppose that f(x) and g(x) are functions on R such that the range of f is [-5,5], and the range of g is [-2,2]. The range of f(x) times g(x) is [a,b]. What is the largest possible value of b?

Guest Aug 15, 2021

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277

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Quadratic

The equation y = -16t^2 + 26t + 105 describes the height (in feet) of a ball tossed up in the air at 26 feet per second from a height of 105 feet above the ground. In how many seconds will the ball reach 80 feet? Express your answer as a decimal rounded read more ..

Guest Aug 15, 2021

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433

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Math

For how many real values of x is sqrt(63 - 3*sqrt(x)) an integer?

Guest Aug 15, 2021

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458

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Sum

What is the sum of all the integers between -12.1 and 13.3?

Guest Aug 15, 2021

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350

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help geometry

In the diagram below, WXYZ is a trapezoid such that WX||ZY and $WY \perp Y$. If YZ=12, tan Z=1.5, and tan X=3, then what is XY?

Guest Aug 15, 2021

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273

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Thanks much for the help

Room A stores basketsballs and Room B stores soccer balls. Mr Li took 1/4 of the basketballs and placed them in Room B. He took 1/4 of the soccer balls and placed them in Room A.
2 soccer balls were loaned out of Room A and 4 basketballs were loaned read more ..

Guest Aug 15, 2021

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338

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help algebra

Let a and b be the solutions of the equation 2x^2 - 10x + 5 = 0. What is the value of ab?

Guest Aug 15, 2021

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254

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Domain

There are three real numbers x that are not in the domain of
\[f(x) = \cfrac{1}{1+\cfrac{2}{1+\cfrac 3x}}.\]
What is the sum of those three numbers?

Guest Aug 15, 2021

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276

0

help geometry

1) Let ABCDE be a regular pentagon. Prove that AC bisects angle BCE and AD bisects angle BDE.
2) In quadrilateral BCDE, CBD = 31 degrees, CED = 47 degrees, BCE = 85 degrees. Find angle BDE.

Guest Aug 15, 2021

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269

0

Coordinates

The equation of the line passing through (1,11) and (4,8) can be expressed in the form
x/a + y/b = 1.
Find a.

Guest Aug 15, 2021

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303

2

Factors

How many natural-number factors does N have if N=2^4*3^8*5^2*7^2?

Guest Aug 15, 2021

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