Answer: a) 
b) Cost of a macadamia nut chip cookie is $33.93 and the cost of triple chocolate cookie. is $3.77
c) Elimination method because it enables us to eliminate one of the variables.
Step-by-step explanation:
Let x be the cost of macadamia nut chip cookie and y be the cost of triple chocolate cookie.
Then according to the question we have the following equations:-
Multiplying 5 on both sides of the equation (2), we get
...............(3)
By using elimination method, subtract equation (1) from (3) we get
Substitute the value of y in (2), we get
2.4 +2/5 = 2.8
2.8 / 1/5= 70 / 5 = 14 / 1
The time it takes between when the rock was dropped and when it landed is 1.33 seconds.
<h3>What is the time it takes for the rock to land?</h3>
The time it takes the rock to land on the ground from where it is dropped can be determined by using the function given.
The height of the function when it hits the ground will be zero, so the function can be written as:
64 = 36t²
t² =1.778
t = 1.333 seconds
Learn more about calculating the time of a function here:
brainly.com/question/26898697
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The equation of the line passing throught the points 
and 
has a form
Now the equation of the line passing through points (0, 3) and (−5, 2.5) is
Simplify it:
This equation is in slope-intercept form.
Answer: y=0.1x+3.
3
+
3
+
3
+
3
+
3
5
5
+
5
+
5
+
5
+
5
+
−
8
+
7
+
7
+
7
+
7
+
7
+
7
+
8
8
+
8
