Whatever the answer to.
-7y=28

y=-24

Step-by-step explanation:

y = -4

Step-by-step explanation:

to find that you have to isolate the variable, y

and since -7 is being multiplied to the y you have to get rid of it by doing the opposite, dividing

and whatever you do to one side of the equal sign you MUST do it to the other

so

-7y = 28

/-7     /-7

y = -4

and there's your answer

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13