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All Questions
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231266 Questions
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197
1
Counting question
There are 30 people in my math class. 12 of them have cool dads, 18 of them have cool moms, and 9 of them have cool dads and cool moms. How many people have moms and dads who are both uncool?
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Guest
Jul 6, 2022
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210
1
Geometry problem
The figure below shows 8 identical semi arcs. Each arc has the radius of 5 cm.
(a) Find the total area of the shaded parts.
(b) Find the perimeter of the shaded parts.
(Take 𝝿 = 3.14)
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Guest
Jul 6, 2022
0
211
1
circles
The radius of a circle is 2 inches. When the radius is doubled, by how many inches is the perimeter increased? Express your answer in terms of pi.
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Guest
Jul 6, 2022
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212
1
geometry question
The figure shows a square divided into a square of side x units and four congruent rectangles. What is the perimeter, in units, of one of the four congruent rectangles? Express your answer in terms of x and y.
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Guest
Jul 6, 2022
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129
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Complex numbers
Let z be a complex number such that |z| = 1. Find the largest possible value of |z^2 + z + 1|.
Guest
Jul 6, 2022
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207
1
Word problem
In an election, 1200 total votes were cast for the 3 candidates. The second-place candidate received 155 fewer votes than the winner and 200 votes more than the third-place candidate. How many votes did the winner receive?
BuilderBoi
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Guest
Jul 6, 2022
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189
1
help with geometry
Points A and B are on side YZ of rectangle WXYZ such that WA and WB trisect ZWX. If BY = 3 and AZ = 8, then what is the area of rectanlge WXYZ?
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Guest
Jul 6, 2022
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187
1
counting
How many 3-digit numbers contain exactly one 1 and exactly one 2? Examples include 512 and 271.
BuilderBoi
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Guest
Jul 6, 2022
0
213
3
need help quick pls
For what ordered pair $(a,b)$ are there infinite solutions $(x,y)$ to the system
4x+ay=-8,
2x+y=b.
Thank youuuuu!!!!!
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Guest
Jul 6, 2022
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204
1
geometry
Two circles of radius 10 cm overlap such that each circle passes through the center of the other, as shown. What is the area of their overlap? Express your answer in the simplest radical form.
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Guest
Jul 6, 2022
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218
2
Help
Daniel, Peter and Ivan had a collection of stamps. Peter and Ivan collected 9/16 of the stamps while Daniel and Ivan collected 3/4 of the stamps. Peter and David collected 55 stamps altogether. How many more stamps did Ivan collect than Peter?
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Guest
Jul 6, 2022
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207
1
help algebra
Given $x\neq0$, find the positive value of b such that the equation will have exactly one solution.
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Guest
Jul 6, 2022
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210
1
Geometry
Find the area of a triangle with side lengths 4/3, 2, and 7/3.
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Guest
Jul 6, 2022
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195
1
Quadratic functions
Suppose that 2x^2 - 5x + k = -x^2 + 3x is a quadratic equation with one solution for x. Express k as a common fraction.
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Guest
Jul 6, 2022
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186
1
+42
HELP
Alice and Bob each have a certain amount of money. If Alice receives n dollars from Bob, then she will have 4 times as much money as Bob. If, on the other hand, she gives n dollars to Bob, then she will have 3 times as much money as Bob. If neither gives
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itsTim77
Jul 6, 2022
+17
298
5
+1162
Finally hit 200!
After a week of try-hard, I finally made it to 200 likes! This website is spectacular and I learned plenty of great things from it. I am quarter-proud of this achievement and now I will keep learning from this exceptional site.
off-topic
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nerdiest
Jul 6, 2022
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181
1
+42
HELP
I drove to the beach at a rate of 40 miles per hour. If I had driven at a rate of 30 miles per hour instead, then I would have arrived 25 minutes later. How many miles did I drive?
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itsTim77
Jul 6, 2022
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191
1
Quadratic
The quadratic x^2 + 5x + c has roots in the form of (-5 \pm sqrt(53))/2. What is the value of c?
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Guest
Jul 6, 2022
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116
0
Inequality
Select all the points that satisfy y < 2x + 3.
Guest
Jul 6, 2022
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200
1
Algebra
Pearl writes down seven consecutive integers, and adds them up. The sum of the integers is euqal to 14 times the largest of the seven integers. What is the smallest integer that Pearl wrote down?
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Guest
Jul 6, 2022
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197
1
Algebra
Find all y such that (3y - 5)/6 = (2y - 1)*3 + 3.
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Guest
Jul 6, 2022
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135
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Algebra
Simplify nm^3^2/(2mn).
Guest
Jul 6, 2022
0
130
0
Algebra
Fill in the blank to make the equation true:
13^5*13^3*13^8 = 13^17*___
Guest
Jul 6, 2022
0
154
1
Optimization problem
A factory manufactures two types of gadgets, regular and premium. Each gadget requires the use of two operations, assembly and finishing, and there are at most 120 hours available for each operation. A regular gadget requires 1 hour of assembly and 2 hours
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Guest
Jul 6, 2022
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223
2
Math
George had $120 to buy new baseball equipment. He spent a third his money on a glove, a fourth of his money on a bat, a sixth of his money on a cap and the remaining money on baseballs. How much money did he spend on each item?
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Guest
Jul 6, 2022
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