Answer:
4/6 or 2/3.
Step-by-step explanation:
You need to multiply 1/2 by 3/3 so you can can the denominater having a 6.
Answer:

Step-by-step explanation:
a.


See attached diagram.
b.

Answer:

Step-by-step explanation:
Since Quadrilateral ABCD ~ PQRS, therefore:

Let's find the value of x by using the ratio of two corresponding sides of both quadrilaterals. Let's use:

CD = 5
RS = 4.5
DA = 4
SP = x

Cross multiply


Divide both sides by 5


Answer:
Those are functions on a calculator. Mostly used for Trigonometry.
Step-by-step explanation: