3 years ago

A tutor works with a group of students. She charges $40 for the tutoring session plus $30 for each student in the group.

1 answer:

4 0

If it’s just 40 in total for the whole session , $40 + (30 x (number of students) = ?
But if it’s 40 per student as well then (40 x 30) x (number of students) = ?

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Determine the radius of a circle with a circumference of 14 pi inches

ipn [44]

Answer:

the radius is 7

Step-by-step explanation:

circumference is equal to pi(d)

you said it is 14pi

all you have to do is divide d by 2 to get r

7 0

3 years ago

Find the x intercepts of the parabola with vertex (4,75) and y intercept (0,27)

user100 [1]

The equation for a parabola with vertex $(h, k)$ is
$y=a(x-h)^{2}+k$

We plug in:
$y=a(x-4)^{2}+75$

We find $a$ by plugging in the point $(0, 27)$ :
$27=a(0-4)^{2}+75$
$\Rightarrow 27=a(-4)^{2}+75$
$\Rightarrow 27=16a+75$
$\Rightarrow 16a=-48$
$\Rightarrow a=-3$

So our equation is
$y=-3(x-4)^{2}+75$

To find x-intercepts, we set $y=0$ :
$-3(x-4)^{2}+75=0$
$\Rightarrow -3(x-4)^{2}=-75$
$\Rightarrow (x-4)^{2}=25$
$\Rightarrow x-4=5, -5$
$\Rightarrow x=9, -1$

So the x-intercepts are 9 and -1.

8 0

3 years ago

These the rest of my points here you go be greatful im being generous

Stells [14]

Answer:

thank you have a good day!

8 0

3 years ago

Read 2 more answers

Pleas help don’t understand

Ainat [17]

7.50/ h because 15 is over 2 and h is 1 and since the bottom is half the top is half therefore it is 7.50 over h