Kayla used 4/10 of her allowance to buy yogurt and 5/10 to go skating. what fraction of her allowance does kayla have left? explain

Let w=23 . what is the value of w + 45 ?

Find the value of x. give reasons to justify your solutions! h ∈ ig

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm