Evaluate 15/r-1 when r=5

Mathematics

2 answers:

DochEvi [55]3 years ago

6 0

Answer: 15/5=3 3-1= 2

The answer would be 2. :P

kkurt [141]3 years ago

4 0

15/r-1 when r=5

15 /(5-1)

15 / 4

3 3/4

15/r-1 when r=5

15 /5 -1

3 -1

it depends on whether the entire term is in the denominator

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Thank you now help please

swat32

If it is #17 this:

the class sold 45 sandwiches and collected $150.75, all you need to do is divide.

150.75/45
= 3.35

$3.35 per sandwitch

4 0

3 years ago

(-3x+4)+(8x-5)

VikaD [51]

Answer:

answer is 5x-1

its A

hopes this helps u

4 0

3 years ago

Read 2 more answers

Need help with homework

motikmotik

We have two points describing the diameter of a circumference, these are:

$\begin{gathered} A=(-12,-4) \\ B=(-4,-10) \end{gathered}$

Recall that the equation for the standard form of a circle is:

$(x-h)^2+(y-k)^2=r^2$

Where (h,k) is the coordinate of the center of the circle, to find this coordinate, we find the midpoint of the diameter, that is, the midpoint between points A and B.

For this we use the following equation:

$M=(\frac{x_1+x_2_{}_{}}{2},\frac{y_1+y_2}{2})$

Now, we replace and solve:

$\begin{gathered} M=(\frac{-12+(-4)}{2},\frac{-4+(-10)}{2} \\ M=(\frac{-12-4}{2},\frac{-4-10}{2}) \\ M=(\frac{-16}{2},\frac{-14}{2}) \\ M=(-8,-7) \end{gathered}$

The center of the circle is (-8,-7), so:

$\begin{gathered} h=-8 \\ k=-7 \end{gathered}$

On the other hand, we must find the radius of the circle, remember that the radius of a circle goes from the center of the circumference to a point on its arc, for this we use the following equation: