All Questions

376

Need help.

While sorting some change into piggy banks, Larry put 1 coin in the first piggy bank, 3 coins in the second piggy bank, 9 coins in the third piggy bank, 27 coins in the fourth piggy bank, and 81 coins in the fifth piggy bank. If this pattern continues, read more ..

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Guest Aug 19, 2021

255

Complex Numbers

If Q = 11-5i, E = 11+8i, and D = 2i, find Q*E*D.

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Guest Aug 19, 2021

283

Complex Numbers

There are 3 complex numbers a+bi, c+di, and e+fi. If b=8, e=-a-c, and the sum of the numbers is 18i, find d+f.

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Guest Aug 19, 2021

195

Domain

Find the greatest integer value of b for which the expression (9x^3+4x^2+11x+7)/(x^2+bx+18) has a domain of all real numbers.

Guest Aug 19, 2021

251

Domain

What is the domain of the real-valued function f(x)=(2x-7)*sqrt(x^2+6)?

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Guest Aug 19, 2021

401

Equations

1/4X = 18p + 4k
k = 3p

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Guest Aug 19, 2021

353

19 August 2021

Joyce, Ken and Brandon sold some tickets. Joyce sold 1/10 of the tickets. Ken sold 6 more tickets than Joyce. Brandon sold 82 tickets. Find the number of tickets Ken sold.

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Guest Aug 19, 2021

390

HELP ASAP

Express $0.4\overline5$ as a common fraction.

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Guest Aug 19, 2021

197

what quadrant does the terminal ray of the angle drawn in standard position lie in

what quadrant does the terminal ray of the angle drawn in standard position lie in
13pie/3
-7pie/11
7pie/6 read more ..

Guest Aug 19, 2021

491

+191

I know this may not be hard but I'm having some problems

The three points $(3,-5)$, $(-a + 2, 3)$, and $(2a+3,2)$ lie on the same line. What is $a$?

(I don't know how to do this since the I don't know the slope in this question)

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OrangeJuicy Aug 19, 2021

332

Function

Find the domain of the real-valued function
\[f(x)=\sqrt{-6x^2+12x+18}.\]
Give the endpoints in your answer as common fractions (not mixed numbers or decimals).

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Guest Aug 19, 2021

329

simplify

Simplify the following expression to a simplified fraction:
$$\sqrt{\dfrac{5}{125}}.$$

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Guest Aug 19, 2021

488

+45

repost - need help asap

Let $a,$ $b,$ $c$ be the roots of $x^3 - x + 4 = 0.$ Compute \[(a^2 - 1)(b^2 - 1)(c^2 - 1).\]

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Penguin Aug 19, 2021

359

pls help thank you :)

I'm really bad at this kind of math-- sorry

16. (10 pts) A wooden block has rectangular faces and sides of lengths L, W, and H. The faces have areas of 18.7 cm^2, 38.5 cm^2, and 23.8 cm^2 as shown. Find the lengths of the sides. Show read more ..

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Guest Aug 19, 2021

190

Parametric Equations

What are the y-intercepts of the graph of the parametric equations

x = 1 + 2*sin(t)
y = 2 + 6*cos(t)^2 read more ..

Guest Aug 19, 2021

323

Algebra

Rewrite the expression g^4 + 18g^2 + 24 in the form c(g^2 + p)^2 + q. What is q?

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Guest Aug 19, 2021

196

Number Theory

Suppose $b_a^2 = 71_a$, where a and b represent two distinct digits. If b = a - 11, find b.

Guest Aug 19, 2021

182

Domain

What is the domain of the real-valued function $f(x)=\dfrac{2x-7}{\sqrt{x^2-5x+4}}$?

Guest Aug 19, 2021

351

+50

Still a bit confused(repost)

What is the largest number of regions formed by 6 planes in space?
This was part b of the problem, I already solved part a and I am confused on why it isn't the same answer as part a.

Part a's question: read more ..

Zekken Aug 19, 2021

198

Floor function

Evaluate $$\lfloor\sqrt{1}\rfloor + \lfloor\sqrt{2}\rfloor + \lfloor\sqrt{3}\rfloor + \dots + \lfloor\sqrt{29}\rfloor$$

Guest Aug 19, 2021

182

Please help

If f(1) = 6, f(x) = f(x-1) x 3 ~ write the first five terms of this sequence

Guest Aug 19, 2021

526

+45

pls help

Let $a,$ $b,$ $c$ be the roots of $x^3 - x + 4 = 0.$ Compute \[(a^2 - 1)(b^2 - 1)(c^2 - 1).\]

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Penguin Aug 19, 2021

Aug 18, 2021

392

+68

One more algebraic thing

If \[\frac{x-y}{x+y} = \frac52,\] find $\frac xy.$

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Bulbous Aug 18, 2021

263

Teacher pls help.TQ

The ratio of the number of cards that Wilbur had to the number of cards Xavier has was 5:9 at first. After Wilbur gave of his cards to his cousin and Xavier lost 84 of his cards. Xavier had twice as many cards as Wilbur. How many cards did both of read more ..

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Guest Aug 18, 2021

184

Complex Numbers

What is $a-2b$, where $a=4-2i$ and $b=3+4i$?

Guest Aug 18, 2021

All Questions ⁺⁰234777 Questions

Need help.

Complex Numbers

Complex Numbers

Domain

Domain

Equations

19 August 2021

HELP ASAP

what quadrant does the terminal ray of the angle drawn in standard position lie in

I know this may not be hard but I'm having some problems

Function

simplify

repost - need help asap

pls help thank you :)

Parametric Equations

Algebra

Number Theory

Domain

Still a bit confused(repost)

Floor function

Please help

pls help

One more algebraic thing

Teacher pls help.TQ

Complex Numbers

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