Answer:
Hence, option C is correct.
Step-by-step explanation:
Given the expression
simplifying the expression
Apply radical rule: 
Apply radical rule:
Apply radical rule:
Therefore,
Hence, option C is correct.
.75 miles a day.
30/.75=40
It will take Tanya 40 days to reach her goal.
Answer:
23
Step-by-step explanation:
Let n be the number
n+15 = 38
Subtract 15 from each side
n+15-15 = 38-15
n =23
The number is 23
Answer:
y = -0.5(x - 4)^2 + 5.
y = -0.5x^2 + 4x - 3.
Step-by-step explanation:
The vertex is at (4, 5). so we have:
f(x) = a(x - 4)^2 + 5
When x = 0 y = -3 so substituting in the above:
- 3 = a(0-4)^2 + 5
-8 = 16a
a = -0.5.
So the vertex form is y = -0.5(x - 4)^2 + 5.
Standard form:
y = -0.5(x^2 - 8x + 16) + 5
y = -0.5x^2 + 4x - 8 + 5
y = -0.5x^2 + 4x - 3.
