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Y
ydubrovensky4
replied to the thread
John and Peter each had some erasers. John gave away 40% of his; Peter gave away 1/7 of his.
.
P * 7 = 13 * 7 P = 91 P - 13 = 91 - 13 P = 78 J / 6 = 78 / 6 J / 6 = 13 13 * 10 = 130 130 + 91 = 221
15 minutes ago
Y
ydubrovensky4
replied to the thread
Figure 1 is formed by a rectangular box measuring 38cm by 15cm and 2 identical white balls...
.
I have tried to understand the problem, but I am getting stuck in the following areas: I am not sure how to calculate the distance...
20 minutes ago
Dr.Peterson
reacted to
topsquark's post
in the thread
Return the sum of numbers depending on number count?
with
Sad
.
See here. -Dan
Today at 4:16 PM
Dr.Peterson
reacted to
Steven G's post
in the thread
Trick or Treat: What trick would you use in solving x^2 - x^3 = 12?
with
Like
.
He grouped it as (x2-22) - (x3 + 23)-----so he factored using the sum of cubes and the difference of squares.
Today at 4:13 PM
Steven G
replied to the thread
There were 288 more red than blue cards. After John used 75% of the red cards and...
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Let r = # of red cards at the beginning. Let b = # of blue cards at the start. There were 288 more red than blue cards===>r-b = 288 or r...
Today at 3:54 PM
topsquark
replied to the thread
Return the sum of numbers depending on number count?
.
See here. -Dan
Today at 3:44 PM
Steven G
reacted to
topsquark's post
in the thread
Finding the equation of a plane ("A golf ball is hit from a tee towards a hole...")
with
Wow
.
Whoops! Please disregard my post. I misread the question. -Dan
Today at 3:24 PM
Steven G
replied to the thread
Return the sum of numbers depending on number count?
.
Add S = n + (n-1) + (n-2) + ... + 3 + 2 + 1 to S = 1 + 2 +3 + ... + (n-2) + (n-1) + n. Then 2S equals?? So S equals?
Today at 3:23 PM
Steven G
replied to the thread
How many times have you seen this?
.
I've seen it so many times that sometimes I think that it must be true--NOT
Today at 3:17 PM
Steven G
reacted to
Harry_the_cat's post
in the thread
How many times have you seen this?
with
Like
.
Today at 3:16 PM
Steven G
replied to the thread
Trick or Treat: What trick would you use in solving x^2 - x^3 = 12?
.
He grouped it as (x2-22) - (x3 + 23)-----so he factored using the sum of cubes and the difference of squares.
Today at 3:14 PM
K
khansaheb
replied to the thread
Return the sum of numbers depending on number count?
.
Similarly - extending the idea of response #2, What happens if you add the sequences 1, 2, 3, 4, 5, 6 and 6, 5, 4, 3, 2, 1, term by...
Today at 3:05 PM
K
khansaheb
reacted to
Dr.Peterson's post
in the thread
Return the sum of numbers depending on number count?
with
Like
.
You mean a sequence of successive whole numbers. And you want the sum of the series consisting of those numbers. Try searching for...
Today at 3:00 PM
Qwertyuiop[]
reacted to
pka's post
in the thread
Find modulus and Arg of the complex number 1 / (1 + i tan(theta))
with
Like
.
Some of this is a repeat, If z=a+b\bf{i} then \dfrac{1}{z}=\dfrac{\overline{~z~}}{|z|^2}=\dfrac{a-b\bf{i}}{a^2+b^2} and...
Today at 1:53 PM
BigBeachBanana
replied to the thread
I want to know the revenue for various revenue categories by giving in a total number of available labor hours
.
Before we can help you come up with an equation, we need to know how you think the hours should be allocated to each project.
Today at 12:58 PM
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