Which pair of triangles must be similar? (hint: try drawing the triangles in the space below) a. Triangles 1 and 2 each have a 35 angle. b. Triangles 3 and 4 are both isosceles. They each have a 40 angle. C. Triangle 5 has a 30" angle and a 90 angle, Triangle 6 has a 30 angle and a 70" angle. D. Triangle 7 has 50" angle and a 25" angle Triangle 8 has a 50 angle and a 105 angle.

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

1/6

step-by-step explanation:

about 168 miles

step-by-step explanation: