Mathematics Stack Exchange
Mathematics Stack Exchange

Questions tagged [education]

For math questions related to the teaching and learning of mathematics. Note that Mathematics Educators Stack Exchange may be a better home for narrowly scoped questions on specific issues in mathematics education.

This tag is for questions that are primarily about mathematics, but are related to mathematics education. Also consider using the or the tag. On the other hand, questions that are primarily about teaching and learning mathematics would be a better fit for MathEducators.SE.

3309 questions
0
votes
2 answers

how to convert one expression to another

I equated them to each other, and they were equal, but .. how to make another from one
0dminnimda
  • 117
  • 8
0
votes
2 answers

How to isolate r in the formula of calculating compound interest with savings

How can we isolate the $r$ in the following formula? $$A = P\left(1 + \frac rn\right)^{nt} + \frac{PMT\left(\left(1 + \frac rn\right)^{nt} - 1\right)}{\frac rn}$$ I went through multiple tutorials but found it hard to solve. It will be really…
HelloWorld
  • 103
0
votes
3 answers

Question about the image of a continuous function not bounded from above or below

I am stuck on the following problem: Let $f :\mathbb R \to \mathbb R$ be a function such that $f$ is not bounded above nor bounded below. Show that if $f$ is continuous on $\mathbb R$ then the image of $f$ is $\mathbb R$. I'm not sure how to…
jeff123
  • 397
0
votes
2 answers

How to divide $10100 \div 2$ with long division?

How to divide $10100 \div 2$? I'm trying to divide 10100 by 2 with pen & paper and getting 550 as answer which is incorrect (**Right answer is 5050). Literally, I think I have forgot primary level math. Could you guys help me to solve this problem…
Coduser
  • 157
0
votes
1 answer

Symmetric closure

Let be a relation on a non-empty set . Define, explicitly in terms of , the relation which is the symmetric closure of . i just started on relations and is confused by how do i go about proving this question in terms of R.
kris
  • 1
0
votes
1 answer

Math into an equation

Currently i did some work with a data set within Java script. I need help writing an equation for some math. Lets say there is List of devices, lets call them X, X1, X2, X3, and so on. Each X has a community(500+) of values assigned to it. lets call…
mister.cake
  • 3
0
votes
1 answer

Future value formula question

Dave and Sharon Sampson established a plan to save 347ℎ(4164 per year) for their children's education. Their oldest child is 5 years old and will begin college in 13 years. They will invest the $347 in a savings account that they expect will earn…
Andrew Nelson
  • 1
0
votes
1 answer

Using mathjax on a computer

Are there any apps or downloadable programs that allow the use of mathjax on a computer - making it easier to type up equations and problems?
Burt
  • 1,813
0
votes
3 answers

What does $y = Ar^t$ mean?

I keep coming up in this question and its variants in my math tests, but it has not been explained to me so I can't really answer it. As such, I am at risk of failing the year. An example question is as below: Bob bought a farm in 1980. In 2017 he…
Chromanyx
  • 101
0
votes
0 answers

Round Steel Bar/Rod Deflection with Minimal Uniform Load Beam Supported on Both Ends

Am I correct that I need to use the sum weight of the steel rod and the weight of the uniform load to calculate the total load on beam (W)? https://engineersedge.com/beam_bending/beam_bending1.htm I ask because the calculations do not seem to be…
Mark Main
  • 301
0
votes
1 answer

Why is it from high to low if we show a decimal

From my experience, when we give a range we usually go from lowest to highest. EG, from 1 to 10 I was reading about mosquitoes and saw this The average mosquito bite drains 0.01 to 0.001 milliliters of blood. Sorry if this is off topic, maybe…
MyDaftQuestions
  • 113
0
votes
1 answer

Simplify the expression below

enter image description here \begin{equation} \sum_{n}\left[\left(\frac{2 \pi n}{a}+k_{x_{0}}\right)^{2}+k_{y}^{2}\right] a_{n} \delta\left(\frac{2 \pi p}{a}-\frac{2 \pi n}{a}\right)=k_{0}^{2} \sum_{m} \sum_{m} a_{n} b_{m} \delta\left(\frac{2 \pi…
yun shi
  • 3
0
votes
1 answer

Question on Combined Variations

The answer I got for K is 192 but I felt that was too much. So any help clarifying would be great. y varies directly with the square root of p and inversely with the square of q. If y=6 when p=4 and q=8. Find y when p=16 and q=4
user678071
0
votes
1 answer

is there a difference between the function y=x/x and the function y=1.

I have been asking people and have been getting mixed answers. some people think it is the same because when you simplify the first one you get y=1, but some people think that they are different because in the first equation x cannot be 0, and in…
user604253
0
votes
1 answer

If $x^y = xy$, what is $y$ in terms of $x$?

I know that $x=y^{\frac{1}{y-1}}$ but I cannot solve for $x$. Can somebody please help me? It should be possible because it is a very simple equation, can somebody please solve it.
user604253
1 2 3
…
26 27