Question

I will give 50 pts, please answer, im so sad and need help

Answer 1

Answer:

b. (-4/3)

Step-by-step explanation:

the average rate of change in the interval is the slope

(-1,4)  (2,0)

slope = (y2-y1)/(x2-x1)

slope = (0-4)/(2--1)

slope = (-4)/(2+1)

slope = (-4/3

Answer 2

Answer:

First, you want to solve for the equation for this problem, would be: 

0.05N + 0.10D = 20.50 

While N = The amount of nickels, and D = The amount of dimes. 

Since N = 164, and D = 123. It would add up to 287 coins. 164 + 123 = 287. 

Now that you have the number for those two variables, solve the equation for when N = 164, and D = 123. 

0.05N + 0.10D = 20.50 

0.05(164) + 0.10(123) = 20.50 

8.2 + 12.3 = 20.50 

20.50 = 20.50 

So, there is 164 nickels, and 123 dimes for your answer. 

I hope this helps! 

Step-by-step explanation: