x is the number of adults and y is the number of children.
x + y = 12
<span>14x + 10y = 140
lets multiply the first equation by -10 and then add it to the second equation:
-10x - 10y = -120
</span>14x + 10y = <span>140
</span>-----------------------
4x + 0 = 20
x = 20/4
x = 5
then substitute in the original equation:
x + y = <span>12
</span>5 + y = <span>12
</span>y = 12 - 5
y = 7
therefore there were 5 adults and 7 children
Answer:
15
Step-by-step explanation:
x+5/36 = x/27
these are similar triangles
Answer:
y=9/4 = 2.25
Step-by-step explanation:
Answer:
nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
nnnn
n
n
n
n
n
nn
n
nn
n
n
n
n
n
n
n
n
n
nn
n
n
n
nn
n
n
nn
n
nn
n
nn
n
n
n
no
Step-by-step explanation:
