All Questions ⁺⁰237779 Questions

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126

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+35

Can your guys give me some hint about how to do this?

What is the value of
What I have tried so far is I am using x to substitue 2013, and let 2014 becomes to (x+10), then after so many simplify step I get x^5+3x^2/x+1. I think my answer probably is wrong, can anyone read more ..

Aarvin30 Jul 24, 2023

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126

0

+1348

stats question

If a data set $\{a_1, a_2,\dots, a_n\}$ has arithmetic mean $x,$ then its variance is defined to be
\[\dfrac{(a_2-x)^{2} +(a_3 -x)^{2} +\dots+(a_n -x)^{2}}{n},\]
and its standard deviation is the square root of the variance. Krys replaces the read more ..

sandwich Jul 24, 2023

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104

1

+1348

3d geometry

In the three-dimensional figure shown, all edges meet at right angles. The surface area of the figure is $180 \text{ in}^{2}$ and the volume is $120\text{ in}^{3}.$ What is the value of $x,$ in inches? Express your answer as a decimal to the nearest hundredth. read more ..

sandwich Jul 24, 2023

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107

66

+33

analytical geometry lvl1

Find the number of square units in the area of the triangle.

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flowiery Jul 24, 2023

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108

2

Help!!!

The sum of three numbers a, b, and c is 88. If we decrease a by 5, we get N. If e increase b by 5, we get N. If we multiply c by 5, we get N. What is the value of N?
I'm really stuck, thanks if anyone could help quickly!!

Guest Jul 24, 2023

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129

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altitudes

I need help with altitudes
Triangle ABC has altitudes AD, BE, and CF. If AD = 12, BE = 12, and CF is a positive integer, then find the largest possible value of CF.

Guest Jul 24, 2023

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133

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proportion

All members of our painting team paint at the same rate. If 20 members can paint a 2000 square foot wall in 30 minutes, then how long would it take the members to paint a 2000 square foot wall, in minutes?

Guest Jul 24, 2023

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127

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+33

help! counting & probability probelem

Every time I use a piece of scrap paper, I crumple it up and try to shoot it inside the recycling bin across the room. I'm pretty good at it: If I shoot pieces of paper at the recycling bin, at least one of them will make it inside the recycling read more ..

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flowiery Jul 24, 2023

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132

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percent

Our badminton team has finished 75% of its season. So far, we have won 20% 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? read more ..

Guest Jul 24, 2023

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112

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rates

I drove to the beach at a rate of 40 miles per hour. If I had driven at a rate of 50 miles per hour instead, then I would have arrived 45 minutes later. How many miles did I drive?

Guest Jul 24, 2023

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108

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Algebra Question

Let u and v be complex numbers such that |u| = |v| = 1, v≠u and u ≠—v. Show that
is real
(u + v)/(u-v) is imaginary ?

Guest Jul 24, 2023

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119

1

What is the smallest distance between the origin and a point on the graph of $y = \frac{1}{\sqrt{2}} (x^2 - 18)?$

What is the smallest distance between the origin and a point on the graph of $y = \frac{1}{\sqrt{2}} (x^2 - 18)?$

Guest Jul 24, 2023

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124

0

Help Probabilty

kelsey is sitting through an hour-long class. the probability she eats a potato chip during this class is 64%. If she has an equal chance of eating a chip anytime throughout the class, what is the probability she eats it in the first 30 minutes? read more ..

Guest Jul 24, 2023

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137

4

Help! Thanks.

If $abc=13$ and$$\left(a+\frac{1}{b}\right)\left(b+\frac{1}{c}\right)\left(c+\frac{1}{a}\right)=\left(1+\frac{1}{a}\right)\left(1+\frac{1}{b}\right)\left(1+\frac{1}{c}\right),$$find $a+b+c$.

Guest Jul 24, 2023

Jul 23, 2023

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123

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PLZ HELP DUE IN AN HOUR

What is the greatest prime factor of 40?
PLZ HELP PLZ HELP IM STOPDI

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Guest Jul 23, 2023

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33

5

Find two numbers with sum of 15 and difference of 4

Find two numbers with sum of 15 and difference of 4

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Guest Jul 23, 2023

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118

2

Help with Trig

Find the value of , , such that . (Give your answer in degrees, not radians.)

Guest Jul 23, 2023

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91

3

explain percent

how to convert 5/40 into percent

Guest Jul 23, 2023

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129

3

help

Jim has two bags of marbles, each of which contains some red marbles and some blue marbles (and no marbles of any other color). The ratio of red marbles to blue marbles in the first bag is $3:5.$ The ratio of red marbles to blue marbles in the second bag read more ..

Guest Jul 23, 2023

Jul 22, 2023

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119

2

Interesting question

For too long, the problems on this website have been an endless bore of routine homework quesitons/calculations. Here is a question to provoke some thought:
For all such that , is it necessarily true that for all nonnegative ? Here read more ..

Guest Jul 22, 2023

0

112

10

+762

Stuff

Give me a couple of math problems and later, I will add them into a challenge problem!

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history Jul 22, 2023

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