A student of mass 50 kg walks up a set of steps 2.5m high. How much
energy has been transferred to the
gravitational potential energy store?

pls help! and pls don't do this if you do not know the answer :) <3
thx I'll mark brainliest to the first answer!!​

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40