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All Questions
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206456 Questions
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82
1
Probability
Three marbles are randomly selected, without replacement, from a bag containing two red, three blue and four green marbles. What is the probability that one marble of each color is selected? Express your answer as a common fraction.
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Guest
Oct 17, 2021
0
116
2
+68
clock time math question
At exactly 12 o'clock noon the hour hand of a clock begins to move at 2 times its normal speed, and the minute hand begins to move backwards at half its normal speed. When the two hands next coincide, what will be the correct time?
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vxnessa
Oct 17, 2021
0
101
2
What's the difference
(22) and (2)2
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Guest
Oct 17, 2021
+5
1
395
3
+115735
Algebra inequality.
Hi all,
no I am not asking a question, I am just answering for someone off this site.
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Melody
Oct 17, 2021
0
120
6
como calculo las potencias con distinta base y distinto exponente?
como calculo las potencias con distinta base y distinto exponente?
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Guest
Oct 17, 2021
0
59
0
Algebra
The polynomial f(x) has degree 3 if f(-1)=15, f(0)=0, f(1)=5, f(2)=0, then what are the x-intercepts of the graph of f?
Guest
Oct 17, 2021
0
93
1
Counting problem
How many distinct odd-digit numbers can be written with the digits 1,2,3, 4 and 5 if no digit may be used more than once?
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Guest
Oct 17, 2021
0
86
1
+36
Math
Ricky has 5 times as many lollipops as Jake. Terry has twice as many lollipops as Jake. Altogether they have 72 lollipops. How many lollipops does Terry have?
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Abcyacomga
Oct 17, 2021
0
77
1
Algebra
Find a so that ax^2 + 15x + 4 + 3x + 5 is the square of a binomial.
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Guest
Oct 17, 2021
0
60
0
Algebra
What is the sum of all values of k such that the equation 2x^2 - kx + 18 = 0 has two distinct integer solutions?
Guest
Oct 17, 2021
0
60
0
Algebra
Let a and b be real numbers such that a + b = -1. Compute a^2 - b^2 + 2a.
Guest
Oct 17, 2021
0
77
1
help with quadratic
The equation y = -16t^2 - 60t + 54 describes the height (in feet) of a ball thrown downward at 60 feet per second from a height of 54 feet from the ground, where t represents time, measured in seconds. What is the maximum height of the ball? Express your
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Guest
Oct 17, 2021
Oct 16, 2021
0
85
1
Please answer in the “OLD LINK”
https://web2.0calc.com/questions/plz-help-sos
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Guest
Oct 16, 2021
0
144
8
+499
Puzzle
https://web2.0calc.com/questions/the-6s-challenge
Straight
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Straight
Oct 16, 2021
0
1
107
1
Algebra
The equation ax^2 + 5x = 3 has x=1 as a solution. What is the other solution?
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Guest
Oct 16, 2021
0
1
105
1
Algebra
If we know that b(b^4 * b^5)^2 = b^x for all real numbers b, what is the value of x?
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Guest
Oct 16, 2021
0
67
0
Please help me!!
prove that if x ≥ 0, then 1+x ≥ 2√x.
Guest
Oct 16, 2021
0
138
1
We know $\overline {DE}\parallel \overline {BC}.$ Given $[ADE]=9$ and $[CDE]=6,$ find $[ABC].$ [asy] size(5cm); pair A,B,C,D,EE; B=(0,0);
We know $\overline {DE}\parallel \overline {BC}.$ Given $[ADE]=9$ and $[CDE]=6,$ find $[ABC].$ [asy] size(5cm); pair A,B,C,D,EE; B=(0,0); C=(5,0); A=(3,3); D=(2A+3C)/5; EE=(2A+3B)/5; draw(C--B--A--C--EE--D); label("$A$",A,N); label("$B$",B,SW); label("$C$",C,SE);
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Guest
Oct 16, 2021
+3
184
7
+499
The 6s Challenge
Hello, I have a puzzle for you that you are welcome to solve. (This is not mine puzzle!)
There are rules:
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Straight
Oct 16, 2021
0
112
1
help please hard problem!!!
A rectangular prism has a total surface area of $56.$ Also, the sum of all the edges of the prism is $60.$ Find the length of the diagonal joining one corner of the prism to the opposite corner.
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Guest
Oct 16, 2021
0
91
1
Binomial Theorem
Find the coefficient of x^2 in the expansion of (3/x^2 - 4x^4)^8.
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Guest
Oct 16, 2021
0
73
1
Functions
Let $f(x) = 5x+3$ and $g(x)=x^2-4$. What is $g(f(-1))$?
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Guest
Oct 16, 2021
0
59
0
trig
If cos 10x = a_1 cos(x)^10 + a_2 cos(x)^8 + a_3 cos(x)^6 + a_4 cos(x)^4 + a_5 cos(x)^2 + a_6, find the coefficient a_4.
Guest
Oct 16, 2021
0
84
1
help geometry
In triangle ABC, BAC = 78 degrees and ACB = 33 degrees. The incircle of triangle ABC touches sides BC, AC, and AB at D, E, and F, respectively. Find EFD in degrees.
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Guest
Oct 16, 2021
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