Answer:
d.
Step-by-step explanation:
Since it's an isosceles triangle, WX=WZ= 2n-5
Perimeter = n + (2n-5) + (2n-5)
= 5n - 10
The Perimeter is given to be 20
5n - 10 = 20
5n = 30
n = 6
Solve as a simultaneous equation maybe?
f(x) + g(x) = 2x or x/(x-6) + y =2x
and then solve so it becomes 2x^2 + 5x =y
then factorise into brackets or use quadratic formula
Let the number of reptiles on endangered list be 'x'
2x + 16=158
2x=158-16
2x=142
x=71
So there are 71 reptiles on the endangered list
Answer:
Small candies 
Extra large candies 
Step-by-step explanation:
Let small candies 
Extra large candies 
the number of candies is at least
.

Cost of
small candy 
Cost of
extra large candy 
but she has only
to spend

Solve for

Since number of candies should be integer.
let 
total spend
which is more than
, so this combination is not possible.

She has
more so she can buy
more small candy.
Hence small candy 
extra large candy 
Answer: a reasonable answer would be 4 balls maximum and 0 balls minimum to any of 4 given boxes with the 4 box totals = 4 balls.
Step-by-step explanation: