Explain the advantages of using substitution to solve the system of equations instead of elimination: X= 6+ y
48=2X+ 2Y

A class plants a tree. Sketch the graph of the height of the tree over time. Identify the two variables ?
Describe the relationship between the two variables ?
Sketch the graph.

Identify congruent segments.
𝑋𝑌 = 2.1 𝑐𝑚, 𝐴𝐵 = 4 𝑐𝑚, 𝑌𝑍 = 4 𝑐𝑚, 𝑃𝑄 = 2.1 𝑐𝑚

Solve Each system : Explain your choice of Solution method
2X - 3Y = 14
5X + 4Y = 12

The first and the last bird are sitting 40 cm apart. Find the distance between the third and the fourth bird using the segment addition postulate.

Solve System of equations using Substitution :
Y = 2X-1
2X  +3 Y =  -7

Find the distance between the coffee shop and the school.

Solve Each system : Explain your choice of Solution method
5X - 2Y = - 6
3X - 4Y = - 26

Solve Each system : Explain your choice of Solution method
8X - 4Y = - 4
X= Y - 4

Hari rides his bike from his home for 30 minutes at a fast pace. He stops to rest for 20 minutes and then continues in the same direction at a slower pace for 30 more minutes. Sketch a graph of the relationship of Hari’s distance from home over time ?

Solve Each system : Explain your choice of Solution method .
6X - 5Y= - 1
6X + 4Y= - 10

Solve System of equations using Substitution :
X = Y  + 6
X + Y = 10

At a Clothing Store , 3 shirts and 8 hats costs $65.The Cost for 2 shirts and 2 Hats is $30.How much does each shirt and hat cost ?

Bose is practicing Javelin throws. What is the relationship between the height of the javelin and time ? What would the graph of this function look like?

H =  g T2, where H is maximum height and T is time of the flight.

Nate starts a lawn – mowing business. In his business he has expenses and revenue. Nate’s expenses are the cost of the lawn mower and gas and his revenue is $25 per lawn. At What point will Nate’s revenue exceed his expenses?

Find the value of x if the vertical lines of the letter H are parallel.