Add −1.25+2.5

Plot the first addend and the sum on the number.
Please tell the explain

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$