Find the missing side lengths. Leave your answers as radicals in simplest from 7)
8)
8
a
20
4
.
45°
60°
b
y
A) x = 10, y=5V3
B) x= 10, y=10
A) a = 8, b = 8
B) a = 4/6, b=476
C) a=4V2, b=4V2
D) a=8V2, b=8V2
C) x = 10V3, y=10
D) x = 1073, y=573
9)
10)
I
913
18
60°
X
.
60°
y
A) x=9V3, y=9
B) x=9V3, y=3V3
C)x= 18, y=313
D) x = 18, y=9
A) x = 18, y=9
B) x = 9, y=9
C) x =9, y=3V3
D) x = 18, y=3V3

(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

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart