Henry makes orange squash with 7 parts squash to 4 parts water.
Paul makes orange squash with 8 parts squash to 5 parts water.
Whose squash will taste sweeter?

Henry's squash is sweeter

Step-by-step explanation:

In order to find out which persons squash is sweeter , you have to realize that the higher the percentage of squash to water means that it is sweeter.

ratio of squash to water is 7 : 4

finding the percentage of squash

7 + 4 = 11 , this is the denominator

NOTE : to get the percentage , multiply the fraction by 100

= 7 / 11 * 100

= 63.6 %

ratio of squash to water is 8 : 5

finding the percentage of squash

8 + 5 = 13 , this is the denominator

NOTE : to get the percentage , multiply the fraction by 100

= 8/13 * 100

=61.5 %

Henry percentage of squash is 63.6 % while Paul's percentage of squash is 61.5%. hence the one with the greater percentage is Henry

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this