Answer:A
Step-by-step explanation: The dotted line on the bottom is y> -3, the diagonal line is y<= -x.
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
7 in a half hrs everyday for 5 days equal 37.5 hrs
Answer:
i think it's undefined
Step-by-step explanation:
Answer:
6.4
Step-by-step explanation:
i did a test on it and figerd out that the answer is 6.4
