Answer:
-61
Step-by-step explanation:
We use the distributive property to distribute 6 to both x and 11. This gives 6x+66=-300. Subtracting both sides by 66 gives 6x=-366. Dividing both sides gives x=-61.
Answer:
b) 300in^2
Step-by-step explanation:
area of triangle = base x heigth / 2
10 . x 10 / 2 = 100/2 =50
surface area of one face is 50
there 4 sides so 50 x 4 = 200
and the bottom is length x width = 10 x 10 = 100
100 + 200 = 300
By definition, an isosceles triangle has 2 of the 3 sides with the same length. From this, we already know that the third side must be or 5 or 12.
We also know that, for every triangle, the sum of two sides must be always bigger than the third side, for any combination.
From this second affirmation, we know that the third side can not be 5, because:

From this, we conclude that the third side of an isosceles triangle with sides equal to 5 and 12 is equal to 12.
Brenna and Raelle will need 10 adults. If it is 1:25 then you multiply both by 10, you get 10:250.
Hope this helped! :D