Answer:

Step-by-step explanation:
Given

Required
Solve for w

In absolution functions;

So, the given expression can be rewritten as

Removing the absolute sign, will gibe
or 
When the second inequality os rewritten, it gives
or 
Reorder both inequalities
or 
Lastly, both inequalities are combined

She can find out answer by dividing 21÷3 and the answer is 7
She can make 7 bird house
Answer:
x intercept (36, 0)
y intercept (0, 9)
Step-by-step explanation:
x intercept when y = 0 so x = 36
y intercept when x = 0 so 4y = 36; y = 9
Answer
x intercept (36, 0)
y intercept (0, 9)