I really need your help as i am struggling in solving these questions
a) The rental charge for davids telephone is £25 per quarter and calls cost 5p per unit. He wishes to keep the bill to a maximum of £60. Let x be the number of units used and form an inequality in x and solve it.
b) Carmel borrows a car from khalid. He says that she can borrow it for 5 hours but must not exceed 50mph
Let m be the number of miles driven and form an inequality for m and solve it.
Your help would be most appreciated