Answer:
78.54in²
Step-by-step explanation:
i used the formula
Answer:
B
Step-by-step explanation:
Answer:
a) 29.45 cm (2 dp)
b) 220.89 cm² (2 dp)
Step-by-step explanation:
<u>Formula</u>



<u>Calculation</u>
Given:
- r = 15 cm


Answer:
The equation can define y as a function of x and it also can define x as a function of y.
Step-by-step explanation:
A relation is a function if and only if each value in the domain is mapped into only one value in the range.
So, if we have:
f(x₀) = A
and, for the same input x₀:
f(x₀) = B
Then this is not a function, because it is mapping the element x₀ into two different outputs.
Now we want to see it:
x + y = 27
defines y as a function of x.
if we isolate y, we get:
y = f(x) = 27 - x
Now, this is a linear equation, so for each value of x we will find an unique correspondent value of y, so yes, this is a function.
Now we also want to check if:
x + y = 27
defines x as a function of y.
So now we need to isolate x to get:
x = f(y) = 27 - y
Again, this is a linear equation, there are no values of y such that f(y) has two different values. Then this is a function.
Answer:
$1.09
Step-by-step explanation:
16*0.09 = 1.44, 16 + 1.44 = 17.44 (Henry's total cost)
17*0.09 = 1.53, 17 + 1.53 = 18.53 (Ella's total cost)
To find the difference we subtract 18.53-17.44 = 1.09 and so the difference including tax is $1.09