Answer:
? = 10
Step-by-step explanation:
Let " ? " be x.
5 / x = x / 20
x * x = 5 * 20
x² = 100
[ 100 = 10 x 10 = 10² ]
x² = 10²
x = 10
The answer is c I would wait for other answers I'm not sure thats exactly right
Answer:
Step-by-step explanation:
Let the 3 consecutive odd numbers be n, n+2, n+4.
(n+2) + (n+4) = 3n - 9
Collect like terms
n+n-3n=-9-6
-n=-15
n=15,
n+2=17
n+4=19
Answer: m = 5/8
Step-by-step explanation:
Answer:
x = -3
y = 7
Step-by-step explanation:
x + 3y = 18
-3x - 12y = -75
multiply first equation by 4
4 × (x + 3y) = 18 ➡ 4x + 12y = 72
now add the two equations up
4x + 12y - 3x -12y = 72 - 75 (-12y will eliminate 12y)
x = -3
