There are two statements that are true: the angle at vertx D is acute and triangle DEF is a right triangle.
Answer:
4,5 miles
Step-by-step explanation:
In 1 hour: 18/3 = 6 miles
6 . 3/4 = 18/4 = 4,5 miles
Answer:

Step-by-step explanation:
Given

Required
Write the variables and constants on different sides

Add 2x to both sides


Add 5 to both sides



Hence, the equation is

Solving further [divide both sides by 5]
