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A car on a rough road and a concrete road |
2017-08-27 |
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From Ken:
A car is driven on a rough road at a speed of 25km and then on a concrete road with a speed of 70kph. The car has 5.5 hours to travel 225km. How long did the car travel on concrete road?
Answered by Penny Nom. |
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Factors |
2017-08-16 |
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From Gemma:
Why do 315 and 525 have the same number of factors?
Answered by Penny Nom. |
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A 4 sided lot |
2017-08-15 |
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From Micheal:
If one side of .4 acre is 25 feet what would the other three sides be
Answered by Penny Nom. |
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Two circles |
2017-08-13 |
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From Ladines:
Find the equation of the circle passing through points of intersections of circles x²+y²=4y and x²+y²=2x and the center is on line y=2
Answered by Penny Nom. |
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A rectangle and a circle |
2017-08-12 |
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From Ramzan:
a diagram shows the shape of rectangular framework with length (2x+20)cm and with (y+10)cm . The outline is made of wire . If a circle with diameter 56 cm is to be made from the wire and the area of the rectangle is 420 square centimeter ,find the possible lengths and width of the rectangle
Answered by Penny Nom. |
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1 billion x 1 billion |
2017-08-11 |
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From Kona:
1 billion x 1 billion
1 trillion x 1 trillion
Answered by Penny Nom. |
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The perimeter of a sector of a circle |
2017-08-11 |
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From Alisa:
find the perimeter of the sector with radius 7 cm in which the angle at the centre is 60 degrees leave your answer in terms of pi
Answered by Penny Nom. |
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Two digit numbers that contain 5 |
2017-08-11 |
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From Irish:
How many two digit numbers contain the digit 5?
Answered by Penny Nom. |
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(x-18)/7=6 |
2017-08-08 |
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From David:
(x-18)/7=6
Answered by Penny Nom. |
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A pair of linear inequalities |
2017-08-08 |
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From Hempstone:
Solve the inequalities 3x-5<2x+5>4x+9
Answered by Penny Nom. |
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Significant digits |
2017-08-06 |
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From Pat:
The directions for a problem are: "Solve the problem, expressing your answer
using the correct number of significant figures."
Problem
0.0043 divided by 2.04
Answer before using the correct number of significant figures is
0.002107843
Is the correct number of significant figures the number below?
2107843
Pat
Answered by Penny Nom. |
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Teams of 4 from 20 people |
2017-08-04 |
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From Christopher:
math team has 20 people on the team but only 4 can enter the competition. The team captain has to pick 4 of them but he knows that he cannot put James, Bill or Todd on the team with one another or there will be problems. what would the formula be to find the solution to how many possible team combinations the are
Answered by Penny Nom. |
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Ratios and proportions |
2017-08-01 |
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From khurram:
what is ratio and proportion? please give a detailed note on this topic, i am really panic of these calculations
Answered by Penny Nom. |
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A lock with 3 tumblers |
2017-07-29 |
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From Carol:
I have a lock that has 3 tumblers. The numbers are 0 - 9. I cannot recall what I set the combination to. How many combinations will there be with three numbers?
Answered by Penny Nom. |
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A 4 digit safe combination |
2017-07-29 |
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From Donna:
I lost my safe combination :( it is 4 digit # with the last digit being 2.
I do not think the 1st digit is 1, 2 or 3
Can u help? Thank u :)
Answered by Penny Nom. |
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