1. In an hour, Lance can do 1/5 of the job and Kim can do 1/4 of the same job. Letting x be the number of hours it will take them to do the job together.
(1/5 + 1/4) x = 1
The value of x is 20/9 or approximately 2.22 hours.
2. Same as the concept above, the equation that would best describe the situation is,
(1/x + 1/2x)(5) = 1
The value of x is 7.5 hours. Since this value is the number of hours Dominique can do the job alone, Houston's time will be 15 hours.
We can rearrange
x + y = 9
in to
y = 9 - x
This means the value of y is EQUAL to 9 minus the value of x.
[A] fits this description, because y (9) is equal to 9 minus x (0).
[B] does too, because y (0) is equal to 9 minus x (9).
16/10 as a mixed number would be {1 6/10} or {1 3/5}. First, you figure out how many times the denominator fits into the numerator. So you see how many times ten fits into 16 (the answer would be 1) and that's your whole number. Then, you subtract the denominator from the numerator (16-10) and put our answer (5) as the numerator in the fraction next to the 1 you got in the beginning. Then, all you have to do is simplify.
EXAMPLE:
18/10
how many times does 10 go into 18? once.
1 8/10
1 4/5
<h2><u><em>opens down with a maximum</em></u></h2><h2><u><em>THANK YOU !!!! </em></u></h2><h2><u><em>AND HAVE A NICE DAY !!!</em></u></h2>
Answer:
6.25 kg cement, 7.5 L water
Step-by-step explanation:
2.5 kg cement / 4 kg sand = x kg cement / 10 kg sand
x = 6.25
3 L water / 4 kg sand = y L water / 10 kg sand
y = 7.5
