71° the line thats horizontal through center splits the angles. so you take the angle on the opposite side and subtract it from 180° to get the bottom angle. and that angle is equal to x
8.5 feet(12 inches per foot)= 102 inches total
There are 102 inches in 8.5 feet
Answer:
<u>x= -7 , y= 9</u>
Steps:
4x+3y=-1
5x+4y=1
First, multiply the top equations by -5, and the bottom by 4 to get :
-20x-15y=5
20x+16y=4
Then, you’re going to add the two equations with them being on top of each other so you can easily see what cancels out :
-20x-15y=5
+ 20x+16y=4
———————
0+1y=9
From this, you get :
y=9
Now that you have one variable, find x by substituting 9 for y in one of the equations, I choose :
4x+3y=-1
So :
4x+3(9)=-1
Then simplify by multiplying 3 and 9 :
4x+27=-1
Then subtract 27 on each side :
4x=-28
Then, divide by 4 to get that :
x= -7
Hope this helps!!
Answer:
63
Step-by-step explanation:
(4/7)x=36
multiply both sides by 7/4
(7/4)(4/7)x = 36(7/4)
x=63
The double implication "if and only if" is graphically represented by an arrow pointing in both direction, so the correct writing is