Need 9 and 10 find Xs Ys

#9:

    x=17

    y=17

#10:

    x=9

    y=8

Step-by-step explanation:

#9: We know that A=D; G=F; and B=E.

    To find x we need to set up an equation so that A=D (87=5x+2)

    Now we need to solve:

87=5x+2

87-2=5x+2-2

85=5x

85/5=5x/5

17=x

    To find y we need to write an equation so G=F, but since we don't know the value of F, we need to find that first, (180= E+D+F)

180= E+D+F

180= 42+87+F

180=129+F

180-129=129+F-129

51=F

    Now that we know what F is we can write that equation (51=3y) and solve:

51=3y

51/3=3y/3

17=y

#10: We know that H=T; J=R; and K=S.

    To solve for x, we need to write an equation so that H=T (51=6x-3)

    Now solve:

51=6x-3

51+3=6x-3+3

54=6x

54/6=6x/6

9=x

    To solve for y, we need to write an equation so that S=K, but since we don't know the value of S, we need to find that first.

180=T+R+S

180=51+83+S

180=134+S

180-134=134+S-134

46=S

    Now we can write that equation (46=7y-10), and solve:

46=7y-10

46+10=7y-10+10

56=7y

56/7=7y/7

8=y

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: