All Questions ⁺⁰237688 Questions

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308

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Fractions

Scott has a bag of candies. 2/5 of the candies are red. 3/10 of the candies are green. If there are 12 red candies, how many green candies are in the bag?

Guest Dec 31, 2021

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391

2

need help

All triangles have the same value, and all circles have the same value. What is the sum of three circles?

Guest Dec 31, 2021

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364

1

((<1396000>*8)^0,73)/15

((<1396000>*8)^0,73)/15

Guest Dec 31, 2021

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317

1

Math

Zachary collects cans for the recycling club.
On the first day, he found 4 cans.
On the second day, he found 9 cans.
He found 14 cans on the third day.
If this pattern continues, how many cans do you <#> think Zachary will find on the seventh read more ..

Guest Dec 31, 2021

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270

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Algebra

If (x + y)^2 = 25 and xy = 6 + x + y, what is the value of x^2 + y^2?

Guest Dec 31, 2021

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310

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Algebra

Given that x+y= 7/10 and x-y= 5/14*(x + y), find the value of x^2-y^2, expressed as a common fraction.

Guest Dec 31, 2021

Dec 30, 2021

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295

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help Algebra

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 hit the ground? Express your answer as a decimal rounded read more ..

Guest Dec 30, 2021

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310

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Help pls

Ricky has a magic money box.
Every day the box doubles the number of coins placed inside of it.
Ricky put in 3 pennies on Monday.
He looked inside his box on Friday.
How many pennies did Ricky see?

Guest Dec 30, 2021

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265

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Counting

Mr. Smith brings home 7 animals for his 7 children. Each child will adopt a pet to be her or his own. There are 4 different cats (a Siamese, a Persian, a Calico, and a Minx), 2 different dogs (a Poodle and a Golden Retriever), and a goldfish. Anna and Betty read more ..

Guest Dec 30, 2021

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371

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Parabolas

The parabolas defined by the equations y = -x^2 - x + 3 and y = 2x^2 - 1 intersect at points (a, b) and (c, d), where c is greater than or equal to a. What is c - a? Express your answer as a common fraction.

Guest Dec 30, 2021

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247

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counting question

Find the no. of permutations of letters a , b , c , d, e , f , g taken all at a time if "beg" pattern cannot appear in any word.

Guest Dec 30, 2021

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288

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Algebra

What number goes in the box so that
\[x^2 + \boxed{\phantom{00}}x + 4\]
is the square of a binomial? If you find more than one, give your answer as a list.

Guest Dec 30, 2021

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318

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help

(a) Let be defined by Show that f has no inverse function.
(b) Let be defined by Show that g has an inverse function.

I know somebody already posted this. But how would you figure it out without plotting read more ..

Guest Dec 30, 2021

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291

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Series

An infinite geometric series has common ratio 1/8 and sum 80. What is the first term of the series?

Guest Dec 30, 2021

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254

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Algebra

If , m+(1/m) = 8 then what is the value of m^4 + 1/m^4?

Guest Dec 30, 2021

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246

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Algebra

Given 3x + 2/x - 4 = 2(x + 9) + 2x - (7 - 1/x) + 2/x, what is (x^2 + 1)/x?

Guest Dec 30, 2021

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298

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Congruence

If a, b, and c are positive integers less than 13 such that
2*a*b + b*c + c*a == 0 (mod 13)
a*b + 2*b*c + c*a == 4*a*b*c (mod 13)
a*b + b*c + 2*c*a == 8*a*b*c (mod 13) read more ..

Guest Dec 30, 2021

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393

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Base Numbers

In every numeration system (base b) there is a three-digit integer that is (b+1) times the sum of its digits. In base ten the number is 198. In base three the number is 121. Find the number in base eight that has this property

Guest Dec 30, 2021

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298

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Decimals

What is the smallest positive integer n such that 1/n is equal to a decimal number with a 6-digit repeating block?

Guest Dec 30, 2021

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383

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Number Theory

What is the smallest positive integer n! such that the rightmost two digits of n! and (n+1)! are the same?

Guest Dec 30, 2021

+1

434

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+13

help with inverses

let g:(0,inf) when all real numbers be g(x)=x-(1/x) show that g has an inverse. I've already prove that g does not have an inverse when the domain is (-inf,0)U(0,inf) and i got the inverse of y=x-(1/x) which I got y=[x+-sqrt(x^2+4)]/2 but how do I prove read more ..

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owlking299 Dec 30, 2021

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355

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Counting

In a certain region all license plates are composed of three letters followed by three numbers, or three numbers followed by three letters. The only restriction is that zero can never be the first of the three numbers. Find how many license plates are possible. read more ..

Guest Dec 30, 2021

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267

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Sphere

The surface area of a sphere is A pi cm^2 and the volume of the sphere is B pi cm^3. If A/B = 1/2, then what is the radius of the sphere?

Guest Dec 30, 2021

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255

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Probability

if three straws are chosen at random from a set of 10 straws whose lengths are 1cm, 2cm 3cm, 4cm, 5cm 6cm, 7cm, 8cm, 9cm, and 10 cm, find the probability that the three straws will form a triangle.

Guest Dec 30, 2021

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350

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Domain

What is the smallest real number in the domain of the function g(x) = sqrt((x - 3)^2 - (x - 18)^2)?

Guest Dec 30, 2021

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