All Questions

303

Interval

What is the value of b+c if x^2+bx+c>0 only when x\in (-\infty, 2)\cup(8,\infty)?

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Guest Sep 20, 2022

299

quadratic

Let a and b be the roots of the quadratic x^2 - 5x + 3 = 2x^2 - 11x + 14. Find the quadratic whose roots are a^2 and b^2.

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Guest Sep 20, 2022

268

quadratic

Let a and b be the roots of the quadratic 2x^2 - 8x + 7 = x^2 - 14x + 1. Compute a^3 + b^3.

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Guest Sep 20, 2022

197

Algebra

Let a and b be real numbers such that a + b = 4 and a^4 + b^4 = 16.
(a) Find all possible values of ab
(b) Find all possible values of a + b
(c) Find all possible values of a and b

Guest Sep 20, 2022

196

Algebra

Let c be a real number, and consider the system of quadratic equations
y = 6x^2 - 9x + c - x^2 - x
y = 5x^2 - 3x + x^2 + 2x

For which values of c does this system have:
(a) Exactly one real solution (x,y)
(b) More than read more ..

Guest Sep 20, 2022

266

Algebra

Let u and v be the solutions to 3x^2 + 5x + 7 = 2x^2 - 4x - 11. Find u/v + v/u.

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Guest Sep 20, 2022

218

plz help algebra

For a real number r, let s(r) denote the set of real numbers that can be expressed in the form
a1 r + a2 r^2 + a3 r^3 + ...
with an infinite number of terms, where ai in {0,1}
(a) Show that 1/2 an element in S(1/4)
(b) Show that 1/5 read more ..

Guest Sep 20, 2022

275

Goose

There are geese sitting equally spaced along the perimeter circle with a radius meters in the water. The sound waves from their honks travel uniformly radially outward. Geese A honk is decibels from 5 meters away. Geese read more ..

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SundriedFrog Sep 20, 2022

287

+590

Pls help im confused: A portion of the graph of a quadratic function $f(x)$ is shown below. Let $g(x)=-f(x)$ and $h(x)=f(-x)$. If $a$ is th

A portion of the graph of a quadratic function $f(x)$ is shown below. Let $g(x)=-f(x)$ and $h(x)=f(-x)$. If $a$ is the number of points where the graphs of $y=f(x)$ and $y=g(x)$ intersect, read more ..

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weredumbmaster22 Sep 20, 2022

405

+590

Given that $(3,15)$ is on the graph of $y = f(x)$, find a point that must be on the graph of $y = f(x) - 7$. Express your answer as an order

Given that $(3,15)$ is on the graph of $y = f(x)$, find a point that must be on the graph of $y = f(x) - 7$. Express your answer as an ordered pair $(a,b)$ where $a$ and $b$ are real numbers.

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weredumbmaster22 Sep 20, 2022

232

precalc

Calculate
\[ \arccos \sqrt{\cfrac{1-\sqrt{\cfrac{1-\sqrt{\cfrac{1-\sqrt{\cfrac{1+\cfrac{\sqrt{3}}{2}}{2}}}{2}}}{2}}}{2}}.\]
As usual, the output of an inverse trig function should be in radians.

Guest Sep 20, 2022

223

precalc

Find the smallest positive -intercepts of the graph of
y = cos (12x) + cos(16x) + cos(20x)
and list them in increasing order.
Submit your answer as a list of x-coordinates from least to greatest.

Guest Sep 20, 2022

239

halp asap

Solve each of the following systems of equations. Find all solutions. (a) \begin{align*} x+y&=-1,\\ 3x &= 4-3y. \end{align*} (b) \begin{align*} 3x - 4y + 2&=0,\\ 10 - 10y& = 10y - 15x. \end{align*}

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Guest Sep 20, 2022

308

+28

I can't seem to find out how to solve this problem, can anyone help me?

So I really don't know how to do this, and I am very confused as to how and I've tried a lot of different solutions. I just can't figure out how to calculate the answer. Can someone please show me the steps to solve this? Thanks
a) Tan(alpha + beta) read more ..

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twiistedwhyami Sep 20, 2022

Sep 19, 2022

263

+660

Help Much Appreciated

Pearl writes down seven consecutive integers and adds them up. The sum of the integers is equal to 6 times the largest of the seven integers. What is the smallest integer that Pearl wrote down?

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Keihaku Sep 19, 2022

242

help plz

if f(0)=0,f(1)=2,f(2)=5 and f(x)=ax^2+bx+c, what is the value of f(3)?

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Guest Sep 19, 2022

223

functions

A) Given that (3,15) is on the graph of y= f(x), find a point that must be on the graph y=f(x)-7. Express your answer as an ordered pair
B) Given that (-2,3) is on the graph y=f(x), find a point that must be on the graph of y=f(2x+1)+3. Express read more ..

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Guest Sep 19, 2022

270

HELP ME FAST!

Find the value of B-A if the graph of Ax + By = 3 passes through the point (-7,2) and is parallel to the graph of x + 3y = -5.

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Guest Sep 19, 2022

262

+13

CPHILL HELPPPP or someone else

In square ABCD, P is the midpoint of BC and Q is the midpoint of CD. Find sinPAQ

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Dachenster Sep 19, 2022

232

PLZZ HELP MEE

Given the functions $f(x)=\dfrac{x+5}{3}$ and $g(x)=\dfrac{1}{f^{-1}(x)+1}$, find the value of $g(3)$.

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Guest Sep 19, 2022

261

The 'perpendicular bisector' of the line segment is the line that passes through the midpoint of and is perpendicular to . The

The "perpendicular bisector" of the line segment is the line that passes through the midpoint of and is perpendicular to .
The equation of the perpendicular bisector of the line segment joining the points and is . Find . read more ..

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Guest Sep 19, 2022

207

help counting

In the array below, in how many different ways can we start with the letter and move from letter to letter (horizontally, vertically, or diagonally), to spell the word "ARCH"?

A
RRR read more ..

Guest Sep 19, 2022

261

counting problem

(a) Grogg is ordering pizza from a local pizzeria, which offers ten different toppings: pepperoni, mushrooms, sausage, onion, olives, green peppers, pineapple, spinach, garlic, and hummus (an favorite). For any pizza, any combination of toppings is read more ..

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Guest Sep 19, 2022

210

counting problem

Dogs in the GoodDog Obedience School win a blue ribbon for learning how to sit, a green ribbon for learning how to roll over, and a white ribbon for learning how to stay. There are 100 dogs in the school.
* 62 have blue ribbons, 65 have read more ..

Guest Sep 19, 2022

All Questions ⁺⁰237827 Questions

Interval

quadratic

quadratic

Algebra

Algebra

Algebra

plz help algebra

Goose

Pls help im confused: A portion of the graph of a quadratic function $f(x)$ is shown below. Let $g(x)=-f(x)$ and $h(x)=f(-x)$. If $a$ is th

Given that $(3,15)$ is on the graph of $y = f(x)$, find a point that must be on the graph of $y = f(x) - 7$. Express your answer as an order

precalc

precalc

halp asap

I can't seem to find out how to solve this problem, can anyone help me?

Help Much Appreciated

help plz

functions

HELP ME FAST!

CPHILL HELPPPP or someone else

PLZZ HELP MEE

The 'perpendicular bisector' of the line segment is the line that passes through the midpoint of and is perpendicular to . The

help counting

counting problem

counting problem

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