2x-y=8...(1)
x+y=7....(2)
from (2)
y=7-x....(3)
put (3) into (1)
2x-(7-x)=8
2x-7+x=8
2x+x=8+7
3x=15
x=5.....(4)
put (4) into (2)
x+y=7
5+y=7
y=7-5
y=2
Hope it helps c:
A² + b² = c²
a² + 7² = 25²
a² = 25² - 7²
a² = 576
a = 24
Answer: The height is 24 feet.
Answer:
C 1/4 is your answer. Have a great day
The answer to this is, 377.
I believe there is something wrong with the fourth equation. It shouldn"t be equal the first equation. It should be: -ac = - db
Let's calculate the linear equations of AB & CD
x/(x-b) = (y-a)/y
xy = (x-b)(y-a)
-ax-by+ab=0
y=-ax/b+a
(x+c)/x= y/(y+d)
(x+c)(y+d)=xy
dx+cy+cd=0
y=-dx/c - d
-a/b = -d/c in other words:
-ac = -db (Resembling the fourth equation)