Answer:
240
Step-by-step explanation:
We know that 50% of the number is 150 so we can assume the number is 300(if its 50% just double that number). Next we use the equation 0.80 x 300 which gives us the answer 240.
Hope I helped
Answer:
c.52
Step-by-step explanation:
if susan reads 130 pages in 2.5 days then we have to divide 130 and 2.5 which gives us 52 which kinda means she reads 52 pages per day i hope that clear
Mental way:
415 / 51.9 * 100 = 800 students in the school.
detailed way:
x is the amount of students in the school.
51.9% * x = 415
(divide both sides by 51.9% (or 0.519))
x = 800 students
I'm going to assume that the table looks like this:
Plants: 15 | 20
Fish: 6 | 8
If this is what it looks like, then the equation is:
2F=5P, or F=2.5P
When you have 3 plants, then you can substitute and solve:
2F=5P --> 2F=5(3) --Substitute
2F=5(3) --> 2F=15 --Multiply
2F=15 --> F=7.5 --Divide
The mathematical answer says 7.5 fish, but this answer might
be incorrect because we can clearly see that there are more plants than fish.
So, another method that you could use is to fill in the table:
Plants: 0 | 5 | 10 |15 | 20
Fish: 0 | 2 | 4 | 6 | 8
We can see from the table that when there are 0 plants, there are 0 fish,
and when there are 5 plants, there are 2 fish. We know that 3 is 3/5 of 5,
so we can use this ration to find 3/5 of 2, to find the number of fish in the
tank when there are 3 plants.
3/5 of 2 ends up being 1.2, but it's impossible to have 1.2 fishes (yes,
fishes is indeed a word), so you should round down to the nearest whole
fish.
The answer is 1.
