I travell 25km in 2 1/2 hrs , walking part of the way at 3km/h and covering on scooter the rest 24km/h. how far do I walk ? answer with explanation​

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.

Find the solution of this system of equation -7x+y=-20 9x-3y=36