Kaydeen is long jumper whose personal best is 6m. Her personal best jump is 20% greater than the school's championship record. (I) what is the school's championship record?
(ii) The National record is 7.5 m. By what percentage must Kaydeen increase her personal best jump to EQUAL the national record?

The school's championship record is 5 m

Kaydeen must increase her personal best by 25%

Step-by-step explanation:

Find the school's championship record by dividing 6 by 1.2

6/1.2

= 5

So, the school's championship record is 5 m

Find the percentage that she has to increase her personal best to equal the national record, by finding the percent change

Divide the difference in the scores by Kaydeen's score

1.5/6

= 0.25

So, Kaydeen must increase her personal best by 25%

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: