1. Find the value of each expression. Show your work. (a)
(b)
(c)


(Score for Question 2: ___ of 4 points)
2. Consider the expression .
(d) How many terms are there?
(e) How many factors are in the first term? Identify them.
(f) Which term is a constant?


(Score for Question 3: ___ of 5 points)
3. Consider the expression .
(a) What is the value of the expression? Show your work.
(b) Show where to place grouping symbols so that the value of the expression is 45. Show how the value of the expression changes to 45.

answer: i don't understand. what are the options

step-by-step explanation:

the anwser is d) 75°

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.