All Questions ⁺⁰237827 Questions

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2124

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+119

Solution of sin(x)=1-2cos^2(x)

"Simplify using identities so that you can solve the equation. Give the general solution in radians."
sin(x)=1-2cos^2(x)
I ended up getting...
x = - pi/6 + n2pi, x = - 5pi/6 + n2pi, x = pi/2 + n2pi
...which apparently is incorrect. I'd appreciate read more ..

Aleguan Jan 16, 2018

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3199

1

I have answers-Need To Make Sure I'm Right

1. The radioisotope Cobalt-60 is used in cancer therapy. The half-life of this isotope is 5.27 years.
Which equation determines the percent of an initial amount of the isotope remaining after t years?
A=5.27(12)100tA=5.27(12)100t read more ..

Guest Jan 16, 2018

0

4819

1

1. A population of bacteria doubles every 12 hours. Initially, the population of bacteria is 80.

1. A population of bacteria doubles every 12 hours. Initially, the population of bacteria is 80.
What is the population of the bacteria after 30 hours?
Round to the nearest whole number.
read more ..

Guest Jan 16, 2018

+1

847

2

+1443

help need to know what im doing wrong

Coco flips a penny, a nickel, and a quarter. Each coin is fair (meaning that heads and tails are equally likely to come up). What is the probability that at least one of the coins comes up heads?
Enter your answer as a fraction in simplified form. read more ..

SmartMathMan Jan 16, 2018

+1

970

1

+1443

help urgent can anyone solve this?

Acme Corporation has released an alphabet soup in which each of the vowels (A, E, I, O, U) of the English alphabet appears five times (and the consonants do not appear at all). How many five-letter words can be formed from a bowl of Acme Vowel Soup? (Note: read more ..

SmartMathMan Jan 16, 2018

+1

1334

1

Geometry

Graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7) .
Use the Polygon tool to graph the quadrilateral by connecting all its vertices.

read more ..

Guest Jan 16, 2018

0

701

1

+4117

Help.

NotSoSmart Jan 16, 2018

-1

724

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+956

A lil more physics :O?

Okay so they provided us with a PhET lab, but my question is can you just provide me with the formula I need to calculate the frequency for the 1st, 2nd, read more ..

Julius Jan 16, 2018

+1

1104

1

+1443

help urgent problem

Tino's Ice Cream Shoppe features seven flavors: vanilla, chocolate, pistachio, coconut, blackberry, lemon, and saffron. Tino will gladly make you an ice cream shake featuring any two scoops you want (not necessarily of different flavors). For example, you read more ..

SmartMathMan Jan 16, 2018

+1

1451

1

+1443

Help plz anyone out there? no one?

In SHORT BINGO, a 5 x 5 card is filled by marking the middle square as WILD and placing 24 other numbers in the remaining 24 squares.
Specifically a card is made by placing 5 numbers from the set 1 - 10 in the first column, 5 numbers from 11 read more ..

SmartMathMan Jan 16, 2018

0

1859

1

+27

Help Please!! Algebra 2

Factor the polynomial
−4y2+3xy−12y+9x
The first term of one factor is provided. Complete the factoring. read more ..

mathretarted Jan 16, 2018

0

815

1

+4117

Help.

Help.

Find the area of this parallelogram

NotSoSmart Jan 16, 2018

0

1332

2

+299

Use a number line to order the numbers from least to greatest

2.26, 12/5, 26.8%, 2.26, 271

Nerd123 Jan 16, 2018

0

1143

2

http://prntscr.com/i1bhk7

http://prntscr.com/i1bhk7
What is the value of x?
Enter your answer, as a decimal, in the box.

Guest Jan 16, 2018

+1

1042

6

+1378

Two problems that I never learned how to solve

Compute 1 - 2 + 3 - 4 + ... + 2005 - 2006 + 2007.

and
read more ..

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AnonymousConfusedGuy Jan 16, 2018

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1221

1

HELPP PLEASE i NEED THIS DONE BY TODAY PLEASE

What is the value of x?
Enter your answer, as a decimal, in the box.
?cm
http://prntscr.com/i1bhk7 read more ..

TheXSquaredFactor ●

Guest Jan 16, 2018

0

666

2

The Australian Open

The Australian Open, which is underway right now, is a Grand Slam annual Tennis tournament. If the first round begins with 128 matches for both men and women, how many matches are played, in both men and women separately, in order to crown the Champion? read more ..

Guest Jan 16, 2018

+1

961

3

+1443

help plz

Tom got a Mr. Potato Head for his birthday. It came with 3 hairstyles, 2 sets of eyebrows, 1 pair of googly eyes, 2 sets of ears, and 2 sets of lips, a pair of regular shoes, and a bonus pair of clown shoes. If a complete Mr. Potato Head personality includes read more ..

SmartMathMan Jan 16, 2018

+1

923

1

+1443

help me!

How many different three-letter sets of initials are possible using the letters A through G?

SmartMathMan Jan 16, 2018

+1

741

1

+1443

help plz

There are 5 girls and 5 boys in a chess club. The club holds a round-robin tournament in which every player plays against every other player exactly once.
In how many games does a girl play against a boy?

SmartMathMan Jan 16, 2018

+1

1056

2

+1378

The sum of the first n terms in the infinite geometric sequence {1/4, 1/8, 1/16, ...} is 255/512. Find n.

The sum of the first n terms in the infinite geometric sequence {1/4, 1/8, 1/16, ...} is 255/512. Find n.

👍 👍

AnonymousConfusedGuy Jan 16, 2018

+1

912

2

+1378

Another Quick Question

The roots of the equation 2x^2 - 5x - 4 = 0 can be written in the form x = (m±sqrt n)/p, where m, n, and p are positive integers with a greatest common divisor of 1. What is the value of n?

Thanks :D

AnonymousConfusedGuy Jan 16, 2018

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937

1

+595

What are the domain and range of the function?

What are the domain and range of the function?
f(x)= -3/5x3

jbouyer Jan 16, 2018

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5922

1

+595

Which graph represents the function f(x)= 2/x-1+3?

Which graph represents the function f(x)= 2/x-1+3?

jbouyer Jan 16, 2018

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