Answer:
$38.84
Step-by-step explanation:
1) 48.00 x 0.07 = 3.36 (she must pay this amount)
2) 48.00 x 0.1 = 4.8 (she must tip this much)
48.00 - 4.8 + 3.36 = 39.84
She has 39.84 dollars she can use to order food with.
Answer: 30&90
Step-by-step explanation:
Problem 9
The instructions aren't stated anywhere, but I'm assuming your teacher wants you to find the equation of each parabola.
The vertex here is (h,k) = (-6,-4) which you have correctly determined.
This means
Next we plug in one of the other points on the parabola. We cannot pick the vertex again. Let's pick the point (-4,0) which is one of the x intercepts. We'll do this to solve for 'a'
This means
represents the equation of the parabola in vertex form.
<h3>Answer:
</h3>
========================================================
Problem 10
The vertex is (h,k) = (-2,-6)
So,
Now plug in another point on the parabola like (-1,-8) and solve for 'a'
<h3>Answer:
</h3>
For each equation, you could optionally expand things out to get it into y = ax^2+bx+c form, but I think it's fine to leave it as vertex form.
First one. 5 x 2x + 6 = 30
Second one. X-11=3