 |
|
|
|
|
|
|
|
|
A diameter of a circle |
2020-08-19 |
|
From Apple:
One end of the the diameter of the circle with equation x^2+y^2-4x+4y=2 is (3,1). Find the coordinates of the other end of the diameter.
Answered by Penny Nom. |
|
|
|
|
|
|
A window problem |
2020-08-18 |
|
From Richard:
Hello,
I was hoping your math specialists could help me with some formulas.
I have shapes with specific known variables need to calculate others.
Example:
We make a straight legged arch, This shape has a width a overall height and a leg height, The leg height is always less then the overall, And the top is arched.
We have the width, Height, and leg size.
Need to calculate the length of the curve and sq ft of the shape.
Answered by Harley Weston. |
|
|
|
|
|
|
A word problem with no algebra |
2020-08-11 |
|
From Julie:
At 3pm, Bruce headed north at 30 km/hr. 2 hours later, Lucy headed south at 40 km/hr. At what time will they be 340 km apart
Answered by Penny Nom. |
|
|
|
|
|
|
More on the last 2 digits of a^k = N |
2020-08-07 |
|
From Jay:
I've seen solution methods for finding the last 2 digits
of a^k = N, where a and k are known. My question
is:
What if the number N is known and the last 2
digits are, say, ...62. Is there a way to find, for
any given a, the value of k which will result in a
number where the last 2 digits are ...62? and if
that is possible, then do the same for
a number with the last n digits (say 7 or 53 or
something)?
Answered by Harley Weston. |
|
|
|
|
|
|
Filling holes with stone dust |
2020-07-30 |
|
From Zach:
I’m looking for amount of stone dust needed for thirteen holes with
a 3ft depth and 12in diameter with a 4x4 post. I would need the
measurement in KG.
Answered by Harley Weston. |
|
|
|
|
|
|
A tank, 5/9 full of water |
2020-07-28 |
|
From Nat:
A rectangular tank contains 1200cmsquare of water when it is 5 out of 9 full . Its base area is 80cmsquare . Find the height of the tank.
Answered by Penny Nom. |
|
|
|
|
|
|
Five rational numbers between -4 and -3 |
2020-07-28 |
|
From Priyanshi:
Five rational numbers between -4 and 3
Answered by Penny Nom. |
|
|
|
|
|
|
x+sin(x) |
2020-07-24 |
|
From adm:
f(x)=x+sin(x)
to evaluate f(30)
use radians only or degrees
Answered by Harley Weston. |
|
|
|
|
|
|
Choosing 4 balls from 9 |
2020-07-22 |
|
From sandiso:
What is the probability associated with each possible random sample of size 4 from the population consisting of these nine balls
Answered by Penny Nom. |
|
|
|
|
|
|
why percents can be helpful |
2020-07-02 |
|
From THERESA:
why percents can be helpful
Answered by Penny Nom. |
|
|
|
|
|
|
4sin(2x)cos(2x)+1=0 |
2020-07-02 |
|
From Sheila:
4sin(2x)cos(2x)+1=0
Answered by Penny Nom. |
|
|
|
|
|
|
Some strings of 4 digits |
2020-06-26 |
|
From Judy:
I wrote previously and need more help. I need to generate a list of 4 digit. Numbers using 0-9 with no repetitions
I know that there is a 6 followed by a 2. Order does matter
Thank you in advance for your help.
Answered by Penny Nom. |
|
|
|
|
|
|
Scale factor |
2020-06-26 |
|
From Kinza:
Hi, my question is The perimeter of a triangle is reduced from 75cm to 20cm. What is the linear scale factor?
Answered by Penny Nom. |
|
|
|
|
|
|
A word problem involving linear equations |
2020-06-22 |
|
From Allie:
The length of a rectangular swimming pool is p m and its width is q m. Its given tht the length of the swimming pool is twice its with. if the perimeter of the swimming pool is 150 m, find the values of p and q
this is in the chapter linear equations
Answered by Penny Nom. |
|
|
|
|
|
|
A word problem with fractions |
2020-06-21 |
|
From Sthantsa:
I'm stuck with this question, I don't know where to begin because
i really don't Know where to start.
Jessie and Thulani each has a sum of money. Jessie’s amount is 2/5
that of Thulani’s. If Thulani were to give Jessie R198, then his
remaining amount will be 6/8 that of Jessie’s amount.
How much does Jessie have originally??
Answered by Penny Nom. |
|
|
