Work out the percentage change when a price of £20 is increased to £50

it is 250 percent increase

Step-by-step explanation:

it is cuz if you multiply 20 times 2 you get 40 but you need 50 so you say ok well half of 20 is ten so add a 50 percent in there if it makes sense

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5