10 people can paint a building in 5 days. If each person paints as quickly as the others then how much of
the building could 7 people paint in 5 days? - correct answer 10 people can paint a
building in 5 days. Each person paints 1/10 of the building in 5 days. In 5 days 7 people would paint 7 ×
1/10 of the building In 5 days 7 people would paint 7/10 of the building.
How many meters are there in 21 feet? - correct answer 3.25 feet = 1 meter
1 foot = 1÷3.25 meters
21 feet = 21×1÷3.25 = 6.4615 meters
What is the x value such that y =15 - 3x and y = 0? - correct answer y =15 - 3x and y =
0
Hence 15 - 3x = 0
Hence 3x = 15 x = 5
Put these four fractions in order from smallest to largest: 1/4, 2/3, 4/7, 1/2 - correct answer
If 1/4, 2/3, 4/7, 1/2 are converted to decimals we get 0.25, 0.6666...., 0.571....., 0.5 then the correct
order is obvious
or
If 1/4, 2/3, 4/7, 1/2 are converted to fractions with a common denominator 21/84, 56/84, 48/84, 42/84
then the correct order is obvious.
On a number line what is the distance between -3/7 and -2/3 ? - correct answer The
distance between numbers can be found by using absolute values (|a| or abs(a)).
The distance between these numbers is abs(-3/7 − -2/3 )
= abs(-(3/7 -2/3))
= abs(3/7 -2/3)
= abs(9/21 - 14/21)
= abs(-5/21 )