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Post New Question
All Questions
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230706 Questions
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347
1
Help with math
Ryan had some blue and green buttons. 3/7 of the buttons are blue and the rest were green. He gave away 2/5 of his buttons. 80 of the buttons given away were blue. 2/3 of the buttons left were green. How many buttons did Ryan have altogether at first?
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Guest
Jun 6, 2021
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327
1
Polynomials
Find all integers n such that the quadratic 7x^2 + nx - 11 - 19 = 7x^2 - nx - 30 can be expressed as the product of two linear factors with integer coefficients.
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Guest
Jun 6, 2021
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351
1
Triangle Question
In the triangle above, please find AC.
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Guest
Jun 6, 2021
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381
2
help pls
Linda, Miah, and Noah are all wearing hats with numbers on them. Each person adds the two numbers on the other two hats, and they come up with the totals 11, 17 and 22. What is the largest number that is on a hat?
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Guest
Jun 6, 2021
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267
2
Polynomials
Find the remainder of f(x) divided by x^2 - 1 when f(x) = x^10 - 8x^8+7x^4+ 8x^3-12x^2 -15x - 5.
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Guest
Jun 6, 2021
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337
1
Polynomials
Find the remainder when g(x) = 5x^9 - 4x^2 +2 is divided by 5x+10.
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Guest
Jun 6, 2021
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381
2
Help Plz
Please Explain I don't know where to start
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Guest
Jun 6, 2021
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327
1
Counting
Each page number of a 488-page book is printed one time in the book. The first page is page 1 and the last page is page 488. When printing all of the page numbers, what is the total number of digits printed?
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Guest
Jun 6, 2021
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331
1
algebra
Find all values of r such that (r - 3)/sqrt(r) = -2*sqrt(r).
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Guest
Jun 6, 2021
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327
1
Complex Plane
In the complex plane, the line segment with end-points -11 + 3i and 8 + 5i is plotted in the complex plane. Find the complex number corresponding to the mid-point of this line segment.
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Guest
Jun 6, 2021
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332
1
Percent
Our basketball team has finished 80% of its season, during which we won 48% of the games we played. What percent of the remainder of our games must we win in order to finish the season with the same number of wins as losses?
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Guest
Jun 6, 2021
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328
1
Probability
There are 3 math clubs in the school district, with 5, 7, and 8 students respectively. Each club has two co-presidents. If I randomly select a club, and then randomly select four members of that club to give a copy of Introduction to Counting and Probability,
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Guest
Jun 6, 2021
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325
1
Digit question
A, B, C, and D are positive digits such that ABCD + BCD = 2012. Find A + B + C + D.
JKP1234567890
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Guest
Jun 6, 2021
0
386
8
Help geometry
A parallelogram ABCD has perimeter equal to 124 . Let E be the foot of the perpendicular from A to BC, and let F be the foot of the perpendicular from A to CD. If AE= 7 and AF=20, what is the area of the parallelogram?
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Guest
Jun 6, 2021
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407
1
+208
Geometry Problem
In the diagram, four circles of radius 1 with centres and are tangent to one another and to the sides of , as shown.
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JKP1234567890
Jun 6, 2021
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405
1
+318
Fractions and Decimals
Ivor, the ice-cream man, is preparing 12 cones. Half of the cones have 2 scoops, 1/4 have 3 scoops, and the rest have 1 scoop. Half of the 2-scoop cones have sprinkles, 1/3 of the 3-scoop cones have sprinkles, and all of the
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JKP1234567890
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Tgfromthe4
Jun 6, 2021
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319
1
Geometry
What is the value of x in the diagram?
JKP1234567890
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Guest
Jun 6, 2021
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440
1
+129
Ratios
Wayne's savings to Stef's savings were in the ratio 5 : 6. After spending $28 each, the ratio became 1 : 4.
(a) Find Wayne's savings before he spent $28.
(b) Find Stef's savings after she spent $28.
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Soyoxxommm
Jun 6, 2021
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390
1
+129
Ratios
John has US and foreign stamps in his album. The ratio of the number of US stamps to foreign stamps is 5 : 2. After Paul gives him 12 foreign stamps, the ratio becomes 2 : 1. Find the number of US stamps he has.
JKP1234567890
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Soyoxxommm
Jun 6, 2021
0
365
1
+313
Percentage
William collects 6000 stamps. 40% of the stamps are from England and 25% are from Canada. The other stamps are from countries in Asia. How many stamps from Asia does William have?
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apsiganocj
Jun 6, 2021
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361
2
Counting
How many combinations of pennies (1 cent), nickels (5 cents) and/or dimes (10 cents) are there with a total value of 30 cents?
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Guest
Jun 6, 2021
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372
2
Algebra
What is the greatest common factor of 3x3-6x2-45x
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Guest
Jun 6, 2021
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340
1
Help algebra
What number must be placed in the box in the equation below to produce an equation that has more than one solution:
$1/2*y + 1/4 = 3 + \boxed{\phantom{400} } y$
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Guest
Jun 6, 2021
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370
2
recursive and explicit forms
The recursive formula, a1 = 18.5, an = an−1 + 1.5 models the number of people, in millions, that
own a smartphone in the U.S. n years after 2014. Write an equivalent explicit formula for the
situation.
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Guest
Jun 6, 2021
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349
1
Help counting
How many integers between 25 and 250 (inclusive) are not perfect cubes nor perfect squares?
JKP1234567890
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Guest
Jun 6, 2021
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